CN114002831A - Optical lens, lens module and terminal - Google Patents

Optical lens, lens module and terminal Download PDF

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Publication number
CN114002831A
CN114002831A CN202010739758.2A CN202010739758A CN114002831A CN 114002831 A CN114002831 A CN 114002831A CN 202010739758 A CN202010739758 A CN 202010739758A CN 114002831 A CN114002831 A CN 114002831A
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CN
China
Prior art keywords
lens
component
optical lens
optical
state
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010739758.2A
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Chinese (zh)
Inventor
姚秀文
王玘
周少攀
邵涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN202010739758.2A priority Critical patent/CN114002831A/en
Priority to KR1020237005744A priority patent/KR20230039730A/en
Priority to PCT/CN2021/095254 priority patent/WO2022022026A1/en
Priority to JP2023504663A priority patent/JP7485268B2/en
Priority to EP21850382.9A priority patent/EP4187304A4/en
Publication of CN114002831A publication Critical patent/CN114002831A/en
Priority to US18/158,729 priority patent/US20230164417A1/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00Optical objectives with means for varying the magnification
    • G02B15/14Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/144Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only
    • G02B15/1441Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive
    • G02B15/144113Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive arranged +-++
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/02Constructional features of telephone sets
    • H04M1/0202Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026Details of the structure or mounting of specific components
    • H04M1/0264Details of the structure or mounting of specific components for a camera module assembly
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/001Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0025Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having one lens only
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/001Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/001Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/0065Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element having a beam-folding prism or mirror
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/001Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/009Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras having zoom function
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50Constructional details
    • H04N23/55Optical parts specially adapted for electronic image sensors; Mounting thereof
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/57Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices

Abstract

The application provides an optical lens, a lens module and a terminal. The optical lens comprises a first component, a second component, a third component and a fourth component which are sequentially arranged from an object side to an image side, each of the first component to the fourth component comprises at least one lens, the second component comprises a refraction piece, the refraction piece is used for changing a transmission route of light transmitted from the first component, the third component and the fourth component are coaxially arranged, an included angle is formed between the optical axis of the third component and the optical axis of the fourth component and the optical axis of the first component, the position of the second component relative to an imaging surface of the optical lens is fixed, and the first component, the third component and the fourth component can move relative to the second component. The application provides optical lens aims at realizing when good formation of image effect, obtains an optical lens that has thickness is less.

Description

Optical lens, lens module and terminal
Technical Field
The embodiment of the application relates to the field of lenses, in particular to an optical lens, a lens module and a terminal.
Background
In recent years, with the progress of electronic technology and the rapid development of mobile communication, portable intelligent devices such as mobile phones have become an unavailable part of people's lives, and cameras are one of the indispensable standards. Meanwhile, the demands of the consumers on the shooting of the mobile phone camera are higher and higher, the zoom range is wider, the resolution is higher, the imaging quality is higher and the like. In addition, mobile phones are becoming thinner and thinner, and it is also necessary to save the internal installation space while achieving high imaging performance of the optical lens.
Disclosure of Invention
The embodiment of the application provides an optical lens, include optical lens's camera lens module and include the terminal of camera lens module aims at realizing good formation of image when, obtains an optical lens and camera lens module that have thickness is less to and the less terminal of a thickness.
In a first aspect, an optical lens is provided. The lens comprises a first component, a second component, a third component and a fourth component which are sequentially arranged from an object side to an image side, wherein each of the first component to the fourth component comprises at least one lens, the second component comprises a refraction piece, the refraction piece is used for changing a transmission route of light transmitted from the first component, the third component and the fourth component are coaxially arranged, an included angle is formed between an optical axis of the third component and an optical axis of the fourth component and the optical axis of the first component, the position of the second component relative to an imaging surface of the optical lens is fixed, and the first component, the third component and the fourth component can move relative to the second component so that the optical lens can change among a long-focus state, a middle-focus state, a wide-angle state and a micro-focus state.
In the present embodiment, the lens is taken as a boundary, a side where a subject is located is an object side, and a surface of the lens facing the object side may be referred to as an object side; the side of the image formed by the subject through the lens is the image side, and the surface of the lens facing the image side can be referred to as the image side surface.
In this application embodiment, third component and fourth component coaxial setting, and the optical axis of third component and fourth component and the optical axis of first component are the contained angle, and the position of the relative optical lens's of second component imaging face is fixed, and first component, third component and fourth component all can remove relative second component to make optical lens changes between long focal state, well focal state, wide angle state and little focal state, that is to say, third component and fourth component cooperate first component to move at the in-process of zooming, realize the demand that the object distance of optical lens zooms from long focal state to little focal state in succession when obtaining high imaging performance.
Meanwhile, since the position of the second component relative to the imaging surface of the optical lens is fixed, the optical total length of the optical lens changes with the change of the distance between the first component and the second component, specifically, the longer the first component is away from the second component, the longer the optical total length of the optical lens, that is, the change of the optical total length of the optical lens is realized by changing the distance between the first component and the second component. The optical lens can increase the optical total length of the optical lens, improve the zooming range of the optical lens and improve the imaging quality of the optical lens by moving the distance between the first component and the second component. Meanwhile, the second component comprises a refraction component which is used for changing a transmission route of light transmitted from the first component, so that the optical axes of the third component and the fourth component form an included angle with the optical axis of the first component, the distance of the first component moving relative to the second component can not be increased, the distance from the second component to an imaging surface of the optical lens can only be increased, and when the optical lens is applied to a terminal, the first component can extend out of the terminal, so that the thickness of the terminal can not be increased, the internal space of the terminal is saved, and the thinning of the terminal comprising the optical lens is realized.
In some embodiments, when the optical lens is in a telephoto state, the optical lens satisfies the following relationship:
1.0≤TTL/EFLmax≤1.7;
wherein, TTL is a total optical length of the optical lens, i.e., a total length from an object-side surface of a lens closest to the object side of the optical lens to the image plane. EFLmax is the effective focal length of the optical lens in a long-focus state.
Generally, the effective focal length of the optical lens in the telephoto state is proportional to the total optical length, and in order to achieve the miniaturization requirement, the total optical length is as small as possible, so the ratio should be as small as possible. In the embodiment, by defining the range of the ratio of the total optical length of the optical lens to the effective focal length of the optical lens in the telephoto state, the thickness of the optical lens is ensured to be sufficiently small, which is beneficial to the miniaturization of the optical lens, and the optical lens occupies a smaller space of the terminal when applied to the terminal, thereby realizing the thinning of the terminal.
In some embodiments, the optical lens satisfies the following relationship:
0.01≤IH/EFLmax≤0.1;
and IH is the image height of the optical lens.
The ratio of the image height of the optical lens to the effective focal length of the optical lens in the telephoto state indicates the telephoto capability of the optical lens, that is, the capability of the optical lens to capture an object image at a distance from the optical lens. According to the specified ratio of the image height of the optical lens to the effective focal length of the optical lens in a long-focus state, the telephoto capability of the optical lens can be ensured, different shooting scenes are met, and the user experience is improved.
In some embodiments, the first component has a positive optical power, and the first component satisfies the following relationship:
1.0≦|fs1/ft|≦1.7;
wherein fs is1And ft is the focal length of the first component, and ft is the focal length of the optical lens in a long focal state.
In the present embodiment, when the range of the ratio of the focal length of the first component to the focal length of the optical lens in the telephoto state satisfies the above relational expression, the first component can be conveniently matched with other lenses to obtain a desired optical lens, so that the optical lens has a wider zoom range and can obtain better imaging.
In some embodiments, the second component has a negative optical power, and the second component satisfies the following relationship:
0.1≦|fs2/ft|≦0.7;
wherein fs is2And ft is the focal length of the second component, and ft is the focal length of the optical lens in the long-focus state.
In the present embodiment, when the range of the ratio of the focal length of the second component to the focal length of the optical lens in the telephoto state satisfies the above relational expression, the second component can be conveniently matched with other lenses to obtain a desired optical lens, so that the optical lens has a wider zoom range and can obtain better imaging.
In some embodiments, the third component has positive optical power, and the third component satisfies the following relationship:
0.1≦|fs3/ft|≦0.7;
wherein fs is3And ft is the focal length of the third component, and ft is the focal length of the optical lens in the long-focus state.
In the present embodiment, when the range of the ratio of the focal length of the third component to the focal length of the optical lens in the telephoto state satisfies the above relational expression, the third component can be conveniently matched with other lenses to correct or reduce aberration, so that the optical lens has a wider zoom range and can obtain better imaging.
In some embodiments, the fourth component has a positive optical power, and the fourth component satisfies the following relationship:
0.3≦|fs4/ft|≦0.9;
wherein fs is4Is the firstAnd ft is the focal length of the optical lens in a long focal state.
The above relation specifies a range of a ratio of a focal length of the fourth component to a focal length of the optical lens in a telephoto state, and the fourth component is mainly used for correcting aberration of the optical system, thereby improving imaging quality. In addition, in the present embodiment, when the range of the ratio between the fourth component and the focal length of the optical lens in the telephoto state satisfies the above relational expression, it is convenient for the fourth component to be matched with other lenses to obtain a desired optical lens, so that the optical lens has a wider zoom range and can obtain better imaging.
In some embodiments, the optical lens satisfies the following relationship:
4mm≤φmax≤15mm;
wherein φ max is the diameter of the largest lens among said first, second, third and fourth components.
The size of the largest lens in the optical lens is expressed in terms of the range of the diameter of the largest lens among the first, second, third and fourth components specified above. When the diameter range of the largest lens in the first component, the second component, the third component and the fourth component meets the relational expression, the miniaturization of the optical lens can be facilitated, and when the optical lens is applied to a terminal, the terminal occupies a smaller space, so that the terminal is thinned.
In some embodiments, the first component, the second component, the third component and the fourth component have N lenses with optical power, where N is an integer greater than or equal to 7 and less than or equal to 15, and at least 7 aspheric lenses are included in the N lenses with optical power. By limiting the number of the optical lenses with the focal power to 7-15 (including 7 and 15), the imaging effect of the optical lens with a wide zooming range is better under the condition that the size of the optical lens is small enough, and meanwhile, the number of the aspheric surfaces of the N optical lenses with the focal power is limited to at least 7, so that the aberration is effectively corrected, the photographing effect of the optical lens is guaranteed, and the user experience is improved.
In some embodiments, the difference between the chief ray angle of the optical lens in the wide-angle state and the chief ray angle of the optical lens in the telephoto state is less than or equal to 3 degrees, so that the color change of an image is avoided, and the imaging quality of the optical lens is improved.
In some embodiments, the difference between the chief ray angle of the optical lens in the telephoto state and the chief ray angle of the optical lens in the micro-focus state is less than or equal to 5 degrees, so as to ensure that the image does not have color change and improve the imaging quality of the optical lens.
In some embodiments, said fourth component comprises a cemented lens. The fourth component is provided with the cemented lens, so that chromatic aberration of the optical lens can be corrected, and the optical lens can obtain better imaging quality.
In some embodiments, the optical lens includes a diaphragm, and the diaphragm is located on the object side of the third component, that is, the diaphragm is located between the second component and the third component, so as to limit the size of the light beam transmitted by the second component to the third component, and ensure that the optical lens achieves a better imaging effect.
In a second aspect, the present application provides a lens module, which includes a photosensitive element, a driving element and the optical lens in any of the above embodiments, wherein the photosensitive element is located at an image side of the optical lens and at an image plane of the optical lens, and the driving element is configured to drive the first, third and fourth elements to move relative to the second element.
The lens module comprises an optical lens, a driving piece and a photosensitive element, wherein the driving piece drives a first component, a third component and a fourth component to move relative to a second component so as to realize zooming. When the lens module works, the driving piece can move the first component away from the second component, the optical total length of the optical lens is increased, and the optical lens reaches a long-focus state, so that the optical lens can shoot a long-distance object image; when the lens module does not work, the driving piece can move the first component to enable the first component to be close to the second component. In the working process of the lens module, the first element can extend out of the lens module, when the lens module is applied to a terminal, the first element can extend out of the terminal, so that the thickness of the terminal cannot be increased, the internal space of the terminal is saved, and the thinning of the terminal comprising the optical lens is realized. Compared with the thickness of a general lens module (the total optical length of an optical lens of the general module is fixed, and the thickness of the optical lens is increased by increasing the total optical length of the optical lens), the thickness of the lens module is greatly reduced, and the lens module has a wider zooming range and improves the telephoto quality.
In a third aspect, the present application provides a terminal. The terminal comprises an image processor and the lens module, wherein the image processor is in communication connection with the lens module, the lens module is used for acquiring image data and inputting the image data into the image processor, and the image processor is used for processing the image data output from the image processor. The lens module of this application embodiment can realize the wide range of zooming and the effect of good formation of image for the terminal of this application can use under the scene of wide range zooming shooting.
In some embodiments, the terminal further includes a housing, the lens module and the image processor are both accommodated inside the housing, the housing is provided with a light hole, the first component of the lens module faces the light hole, and when the driving member drives the first component to be away from the second component, the first component can extend out of the housing through the light hole.
When the lens module is applied to the terminal, the first component can be moved when the lens module works, so that the first component is far away from the second component and extends out of the shell through the light through hole, the total optical length of the lens module is increased, and the optical lens reaches a long-focus state, so that the optical lens can shoot a long-distance object image. That is to say, the first component of lens module when increasing the total optical length can stretch out the shell of terminal, namely, the total optical length of lens module can not influence its occupation space in the terminal at the in-process that changes, does not need the terminal to provide the headspace for zooming of lens module, practices thrift the inner space of terminal, realizes the slimming of terminal.
Drawings
Fig. 1 is a schematic structural diagram of a terminal;
fig. 2 is a schematic structural diagram of another terminal;
FIG. 3 is an exploded view of a lens module according to an embodiment of the present disclosure;
FIG. 4 is a schematic view of another state of the lens module shown in FIG. 3;
fig. 5 is a schematic partial structure diagram of a lens module according to the present application;
FIG. 6 is a schematic view of an optical lens of the lens module shown in FIG. 3;
fig. 7 is a partial structural schematic diagram of the optical lens shown in fig. 6;
FIG. 8 is a schematic view of a portion of the camera module of FIG. 3 from another perspective;
fig. 9 is a schematic view of a zooming process of the optical lens shown in fig. 6;
fig. 10 is a schematic view illustrating another zooming process of the optical lens shown in fig. 6;
fig. 11 is a schematic structural view of an optical lens according to a first embodiment of the present application;
fig. 12 is a schematic view of a zooming process of the optical lens shown in fig. 11;
fig. 13 is a schematic view illustrating another zooming process of the optical lens shown in fig. 11;
fig. 14 is a schematic axial chromatic aberration diagram of an optical lens according to the first embodiment of the present application in a telephoto state;
fig. 15 is a schematic axial chromatic aberration diagram of an optical lens according to the first embodiment of the present application in a middle focus state;
fig. 16 is a schematic view of axial chromatic aberration of an optical lens of the first embodiment of the present application in a wide-angle state;
fig. 17 is a schematic axial chromatic aberration diagram of an optical lens according to the first embodiment of the present application in a micro-focus state;
fig. 18 is a schematic view of lateral chromatic aberration of an optical lens of the first embodiment of the present application in a telephoto state;
fig. 19 is a schematic diagram showing lateral chromatic aberration of an optical lens of the first embodiment of the present application in a middle focus state;
fig. 20 is a schematic view of lateral chromatic aberration of an optical lens of the first embodiment of the present application in a wide-angle state;
fig. 21 is a schematic diagram of lateral chromatic aberration of an optical lens in a micro-focus state according to the first embodiment of the present application;
fig. 22 is a schematic view of curvature of field and optical distortion of an optical lens in a telephoto state according to the first embodiment of the present application;
fig. 23 is a schematic view of curvature of field and optical distortion of an optical lens in a middle focus state according to the first embodiment of the present application;
fig. 24 is a schematic view of field curvature and optical distortion of an optical lens in a wide-angle state according to the first embodiment of the present application;
fig. 25 is a schematic view of curvature of field and optical distortion of an optical lens in a micro-focus state according to the first embodiment of the present application;
fig. 26 is a schematic structural view of an optical lens according to a second embodiment of the present application;
fig. 27 is a schematic view of a zooming process of the optical lens shown in fig. 26;
fig. 28 is another zoom process schematic diagram of the optical lens shown in fig. 26;
fig. 29 is a schematic axial chromatic aberration diagram of an optical lens according to the second embodiment of the present application in a telephoto state;
FIG. 30 is a schematic axial chromatic aberration diagram of an optical lens of the second embodiment of the present application in a middle focus state;
fig. 31 is a schematic axial chromatic aberration diagram of an optical lens of the second embodiment of the present application in a wide-angle state;
FIG. 32 is a schematic axial chromatic aberration diagram of an optical lens of the second embodiment of the present application in a micro-focus state;
fig. 33 is a schematic view of lateral chromatic aberration of an optical lens of the second embodiment of the present application in a telephoto state;
fig. 34 is a schematic diagram of lateral chromatic aberration of an optical lens of the second embodiment of the present application in a medium focus state;
fig. 35 is a schematic view of lateral chromatic aberration of an optical lens of the second embodiment of the present application in a wide-angle state;
FIG. 36 is a schematic diagram illustrating lateral chromatic aberration of an optical lens in a micro-focus state according to a second embodiment of the present application;
fig. 37 is a schematic view of curvature of field and optical distortion of an optical lens in a telephoto state according to the second embodiment of the present application;
fig. 38 is a schematic view of curvature of field and optical distortion of an optical lens in a middle focus state according to a second embodiment of the present application;
fig. 39 is a schematic view of field curvature and optical distortion of an optical lens in a wide-angle state according to a second embodiment of the present application;
FIG. 40 is a schematic view of field curvature and optical distortion of an optical lens in a micro-focus state according to a second embodiment of the present application;
fig. 41 is a schematic structural view of an optical lens according to a third embodiment of the present application;
fig. 42 is a schematic view of a zooming process of the optical lens shown in fig. 41;
fig. 43 is another zoom process schematic diagram of the optical lens shown in fig. 41;
fig. 44 is a schematic axial chromatic aberration diagram of an optical lens according to the third embodiment of the present application in a telephoto state;
fig. 45 is a schematic axial chromatic aberration diagram of an optical lens according to the third embodiment of the present application in a middle focus state;
fig. 46 is a schematic view of axial chromatic aberration of an optical lens of the third embodiment of the present application in a wide-angle state;
FIG. 47 is a schematic axial chromatic aberration diagram of an optical lens according to a third embodiment of the present application in a micro-focus state;
fig. 48 is a schematic view of lateral chromatic aberration of an optical lens according to a third embodiment of the present application in a telephoto state;
fig. 49 is a schematic view of lateral chromatic aberration of an optical lens of the third embodiment of the present application in a medium-focus state;
fig. 50 is a schematic view of lateral chromatic aberration of an optical lens of the third embodiment of the present application in a wide-angle state;
fig. 51 is a schematic diagram illustrating lateral chromatic aberration of an optical lens in a micro-focus state according to a third embodiment of the present application;
fig. 52 is a schematic view of curvature of field and optical distortion of an optical lens in a telephoto state according to a third embodiment of the present application;
fig. 53 is a schematic view of curvature of field and optical distortion of an optical lens in a middle focus state according to a third embodiment of the present application;
fig. 54 is a schematic view of field curvature and optical distortion of an optical lens in a wide-angle state according to a third embodiment of the present application;
fig. 55 is a schematic view of curvature of field and optical distortion in a micro-focus state of an optical lens according to the third embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.
For convenience of understanding, technical terms related to the present application are explained and described below.
Focal length (focal length), also known as focal length, is a measure of the concentration or divergence of light in an optical system, and refers to the perpendicular distance from the optical center of a lens or lens group to an image plane when an infinite scene forms a sharp image on the image plane through the lens or lens group. For a fixed-focus lens, the position of the optical center is fixed and unchanged; for a zoom lens, a change in the optical center of the lens results in a change in the focal length of the lens.
The optical axis is a ray that passes perpendicularly through the center of the ideal lens. When light rays parallel to the optical axis are incident on the convex lens, the ideal convex lens is that all the light rays converge at a point behind the lens, and the point where all the light rays converge is the focal point.
The aperture, which is a device for controlling the amount of light transmitted through the lens and into the light-sensing surface in the body, is typically located within the lens. The expressed aperture size is expressed in F/number.
The F-number is a relative value (reciprocal of relative aperture) obtained by the focal length of the lens/the lens light-passing diameter. The smaller the F value of the aperture, the more the amount of light entering the same unit time. The smaller the F value of the aperture, the smaller the depth of field, and the blurred background content will be photographed, similar to the effect of a telephoto lens.
Back Focal Length (BFL), the distance from the vertex of the image-side surface of the lens closest to the image side in the optical lens to the imaging surface of the optical lens.
Positive power, also known as positive refractive power, indicates that the lens has a positive focal length and has the effect of converging light.
Negative optical power, also known as negative refractive power, indicates that the lens has a negative focal length and has the effect of diverging light.
Total Track Length (TTL), which is the Total Length from the object side surface of the lens closest to the object side of the optical lens to the image plane, is a major factor in forming the height of the camera.
The Chief Ray Angle (CRA) represents the included Angle between the Chief Ray of the lens and the optical axis, and the smaller the Chief Ray Angle is, the clearer the imaging is.
Abbe number, i.e., the dispersion coefficient, is an index indicating the dispersive power of the transparent medium. Generally, the larger the refractive index of the medium, the more severe the dispersion, and the smaller the abbe number; conversely, the smaller the refractive index of the medium, the more slight the dispersion and the larger the Abbe number. A field of view (FOV) is an angle of view formed by two edges of an optical instrument, at which an object image of a measurement target can pass through the maximum range of a lens, with the lens of the optical instrument as a vertex. The size of the field angle determines the field of view of the optical instrument, with a larger field angle providing a larger field of view and a smaller optical magnification.
The object side is defined by the lens, and the side of the object to be imaged is the object side.
And the image side is the side where the image of the object to be imaged is positioned by taking the lens as a boundary.
The object side surface, the surface of the lens near the object side is called the object side surface.
The surface of the lens near the image side is called the image side surface.
The lens is taken as a boundary, one side of the lens where the object is located is an object side, and the surface of the lens close to the object side can be called an object side surface; the side of the lens adjacent to the image side is the image side, and the surface of the lens adjacent to the image side may be referred to as the image side surface.
Axial chromatic aberration, also known as longitudinal chromatic aberration or positional chromatic aberration, is the difference between a beam of light parallel to the optical axis and converging at different positions in front and behind the lens. The light with different wavelengths is converged at different positions by the lens, so that the imaging surfaces of the images of the light with different colors cannot be superposed during final imaging, and the polychromatic light is dispersed to form dispersion.
Lateral chromatic aberration, also known as chromatic aberration of magnification, and the difference in magnification of the optical system for different colored light is known as chromatic aberration of magnification. The wavelength causes a change in the magnification of the optical system, with a consequent change in the size of the image.
Distortion (distortion), also known as distortion, is the degree to which an image made by an optical system on an object is distorted relative to the object itself. The height of the intersection point of the principal rays of different fields of view and the Gaussian image surface after passing through the optical system is not equal to the ideal image height, and the difference between the principal rays and the Gaussian image surface is distortion. Therefore, the distortion only changes the imaging position of the off-axis object point on the ideal plane, so that the shape of the image is distorted, but the definition of the image is not influenced.
Optical distortion (optical distortion) refers to the degree of deformation that is calculated optically.
Diffraction limit (diffraction limit) means that an ideal object point is imaged by an optical system, and due to the diffraction limit, it is impossible to obtain the ideal image point, but a fraunhofer diffraction image is obtained. Since the aperture of a general optical system is circular, the images of Freund and Fischer diffraction are called Airy spots. Therefore, each object point is like a diffuse spot, two diffuse spots are not well distinguished after being close to each other, the resolution ratio of the system is limited, and the larger the spot is, the lower the resolution ratio is.
The application provides a terminal, which can be a mobile phone, a tablet computer, a portable computer, a video camera, a video recorder, a camera or other equipment with photographing or shooting functions. The terminal comprises at least one optical lens, and the optical lens comprises a zoom lens, so that the terminal can achieve the zooming shooting effect. Referring to fig. 1, fig. 1 is a schematic rear view of a terminal according to an embodiment of the present application. In this embodiment, terminal 1000 is a mobile phone. The embodiment of the present application is described by taking the terminal 1000 as a mobile phone as an example.
The terminal 1000 includes a lens module 100, an image processor 200 and a housing 300, the lens module 100 and the image processor 200 are both accommodated inside the housing 300, the housing 300 is provided with a light through hole 301, the light incident side of the lens module 100 is opposite to the light through hole 301 of the housing 300, and when the lens module 100 takes a picture, the lens module 100 can extend out of the housing 300 through the light through hole 301. The image processor 200 is communicatively connected to the lens module 100, the lens module 100 is configured to acquire image data and input the image data into the image processor 200, and the image processor 200 is configured to process the image data output therefrom. The communication connection between the lens module 100 and the image processor 200 may include data transmission through electrical connection such as wiring, or data transmission through coupling. It is understood that the lens module 100 and the image processor 200 may also be connected in communication by other means capable of realizing data transmission.
When the lens module 100 is applied to the terminal 1000, the lens module 100 zooms according to the scene requirement during operation, and during zooming, the lens module 100 can partially extend out of the housing 300 through the light-passing hole 301 to increase the total optical length of the lens module 100, so that the lens module 100 can reach a long-focus state, and the lens module 100 can shoot a long-distance object image. That is to say, the lens module 100 can extend out of the housing 300 of the terminal 1000 when the total optical length is increased, that is, the total optical length of the lens module 100 does not affect the occupied space of the lens module 100 in the terminal 1000 in the process of changing, the terminal 1000 is not required to provide a reserved space for zooming the lens module 100, the internal space of the terminal 1000 is saved, and the terminal 1000 is thinned. In addition, the lens module 100 according to the embodiment of the present invention can achieve a wide zoom range and a good imaging effect, so that the terminal 1000 according to the present invention can be used in a wide zoom shooting scene.
The function of the image processor 200 is to optimize the digital image signal through a series of complex mathematical algorithm operations, and finally transmit the processed signal to the display. The image processor 200 may be a single image Processing chip or a Digital Signal Processing (DSP) chip, and functions to transmit data obtained by the light sensing chip to the central Processing unit and refresh the light sensing chip in time and quickly, so that the quality of the DSP chip directly affects the picture quality (such as color saturation, sharpness, etc.). The image processor 200 may also be integrated in other chips, such as a central processing chip.
In the embodiment shown in fig. 1, the lens module 100 is disposed on the back surface of the terminal 1000 and is a rear lens of the terminal 1000. It is understood that in some embodiments, the lens module 100 can also be disposed on the front surface of the terminal 1000 as a front lens of the terminal 1000. The front lens and the rear lens can be used for self-shooting and can also be used for shooting other objects by a photographer.
In some embodiments, there are a plurality of lens modules 100, and the plurality of lens modules refers to two or more than two. The different lens modules 100 may have different functions, so as to satisfy different shooting scenes. For example, in some embodiments, the lens modules 100 include a zoom lens module or a fixed focus lens module to perform the functions of zoom shooting and fixed focus shooting, respectively. In the embodiment shown in fig. 1, there are two rear lenses of the terminal 1000, and the two lens modules 100 are a normal lens module and a zoom lens module, respectively. The common lens module can be applied to daily common shooting, and the zoom lens module can be applied to a scene needing zooming shooting. In some embodiments, a plurality of different lens modules 100 may be all communicatively connected to the image processor 200, so as to process the image data captured by each lens module 100 through the image processor 200.
It should be understood that the installation position of the lens module 100 of the terminal 1000 in the embodiment shown in fig. 1 is only illustrative, and in some other embodiments, the lens module 100 can be installed at other positions on the mobile phone, for example, the lens module 100 can be installed at the upper middle or upper right corner of the back of the mobile phone. Alternatively, the lens module 100 may be disposed on a component that is movable or rotatable relative to the mobile phone instead of the mobile phone body, for example, the component may extend, retract or rotate from the mobile phone body, and the installation position of the lens module 100 is not limited in this application.
Referring to FIG. 2, in some embodiments, terminal 1000 can further include an analog-to-digital converter 400 (also referred to as an A/D converter). The analog-to-digital converter 400 is connected between the lens module 100 and the image processor 200. The analog-to-digital converter 400 is configured to convert a signal generated by the lens module 100 into a digital image signal and transmit the digital image signal to the image processor 200, and then the image processor 200 processes the digital image signal, and finally displays an image or an image on a display screen or a display.
In some embodiments, the terminal 1000 further includes a memory 500, the memory 500 is in communication with the image processor 200, and the image processor 200 processes the digital image signal and then transmits the processed image to the memory 500, so that the image can be searched from the memory and displayed on the display screen at any time when the image needs to be viewed later. In some embodiments, the image processor 200 further compresses the processed image digital signal and stores the compressed image digital signal in the memory 500, so as to save the space of the memory 500. It should be noted that fig. 2 is only a schematic structural diagram of the present embodiment, and the lens module 100, the image processor 200, the analog-to-digital converter 400, the memory 500, and the like shown in the drawings are only schematic structural diagrams.
Referring to fig. 1 and 3, the lens module 100 includes an optical lens 10, a photosensitive element 20, a driving element, and a housing 30. The housing 30 includes a through hole 31 and an accommodating space 32, the through hole 31 is communicated with the accommodating space 32, the through hole 31 is disposed opposite to the light through hole 301 of the housing 300, the driving member, the photosensitive element 20 and the optical lens 10 are all accommodated in the accommodating space 32, the photosensitive element 20 is connected to the housing 300, the photosensitive element 20 is located on the image side of the optical lens 10 and located on the imaging surface of the optical lens 10, the driving member is used for driving components in the optical lens 10 to achieve zooming, and the light incident side of the optical lens 10 is disposed toward the through hole 31. The optical lens 10 can partially extend out of the accommodating space 32 through the through hole 31 (see fig. 4) when zooming, and further extend out of the housing 300 through the light-passing hole 301. When the lens module 100 is in operation, a subject to be imaged passes through the optical lens 10 and then is imaged on the photosensitive element 20. Specifically, as shown in fig. 5, the lens module 100 works according to the following principle: the light L reflected by the object is projected to the surface of the light sensing element 20 through the optical lens 10 to generate an optical image, the light sensing element 20 converts the optical image into an electrical signal, i.e., an analog image signal S1 and transmits the converted analog image signal S1 to the analog-to-digital converter 400, so as to be converted into a digital image signal S2 by the analog-to-digital converter 400 and then sent to the image processor 200. Of course, in other embodiments, the lens module 100 may not have a housing, and the light sensing element 20 is fixed on a bracket or other structures.
When the lens module 100 works, the optical lens 10 can partially extend out of the accommodating space 32 in the zooming process, and further extend out of the housing 300 through the light-passing hole 301, so that the total optical length of the optical lens 10 is increased, the optical lens 10 is in a long-focus state, and the optical lens 10 can shoot a long-distance object image; when the lens module 100 is not in operation, the optical lens 10 is completely accommodated in the accommodating space 32. During the operation of the lens module 100, since a portion of the optical lens 10 extends out of the housing 30, the height of the housing 30 is not affected. Compared with the thickness of the general lens module 100 (the total optical length of the optical lens 10 of the general module is fixed, and the thickness of the optical lens 10 is increased by increasing the total optical length of the optical lens 10), the thickness of the lens module 100 is greatly reduced, and the zoom lens has a wider zoom range and improves the telephoto quality. When the lens module 100 is applied to the terminal 1000, the thickness of the terminal 1000 is not increased, the internal space of the terminal 1000 is saved, and the terminal 1000 including the lens module 100 is thinned.
The housing 30 includes a bottom wall 33, a peripheral wall 34, and a top wall 35, the peripheral wall 34 being disposed around the bottom wall 33 and connected to the top wall 35 to form the housing space 32. The through hole 31 is provided on the top wall 35, and the photosensitive element 20 is provided on the peripheral wall 34 away from the light passing hole 301. Specifically, a circuit board is further provided between the photosensitive element 20 and the peripheral wall 34, the photosensitive element 20 is fixed on the circuit board by bonding or mounting, and the analog-to-digital converter 400, the image processor 200, the memory 500, and the like are also fixed on the circuit board by bonding or mounting, so that communication connection among the photosensitive element 20, the analog-to-digital converter 400, the image processor 200, the memory 500, and the like is realized through the circuit board. The circuit board may be a Flexible Printed Circuit (FPC) or a Printed Circuit Board (PCB) for transmitting an electrical signal, wherein the FPC may be a single-sided flexible board, a double-sided flexible board, a multi-layer flexible board, a rigid flexible board, a hybrid-structured flexible circuit board, or the like.
The photosensitive element 20 is a semiconductor chip, and includes several hundreds of thousands to several millions of photodiodes on the surface thereof, and when irradiated by light, generates charges, which are converted into digital signals by the adc 400 chip. The photosensitive element 20 may be a Charge Coupled Device (CCD) or a complementary metal-oxide semiconductor (CMOS). The CCD is made of a high-sensitivity semiconductor material, and converts light into electric charges, which are converted into digital signals by an analog-to-digital converter 400 chip. A CCD consists of many photosites, usually in mega pixels. When the CCD surface is irradiated by light, each photosensitive unit reflects charges on the component, and the signals generated by all the photosensitive units are added together to form a complete picture. The CMOS is mainly made of a semiconductor made of two elements, namely silicon and germanium, so that N (negatively charged) and P (positively charged) semiconductors coexist on the CMOS, and the current generated by the two complementary effects can be recorded and interpreted into an image by a processing chip.
The driving member includes a first driving portion, a second driving portion, and a third driving portion. The first driving portion, the second driving portion and the third driving portion are respectively used for driving related elements of the optical lens 10 to realize zooming and focusing of the lens module 100. The first driving part, the second driving part and the third driving part each include one or more driving parts, and the driving parts of the first driving part, the second driving part and the third driving part can respectively drive the relevant elements of the optical lens 10 to perform focusing and/or optical anti-shake. When the first driving portion, the second driving portion and the third driving portion respectively drive the relevant elements of the optical lens 10 to perform focusing, the first driving portion, the second driving portion and the third driving portion respectively drive the relevant elements of the optical lens 10 to perform relative movement so as to achieve focusing. When the first driving unit, the second driving unit and the third driving unit respectively drive the relevant elements of the optical lens 10 to perform anti-shake, the relevant elements of the optical lens 10 are driven to move or rotate relative to the photosensitive element 20, and/or the relevant elements of the optical lens 10 are driven to move or rotate relative to each other, so as to achieve optical anti-shake. The first driving part, the second driving part and the third driving part may be driving structures such as a motor and an electric motor.
The lens module 100 further includes an infrared filter 40, and the infrared filter 40 can be fixed on the circuit board and is located between the optical lens 10 and the light sensing element 20. The light beam passing through the optical lens 10 is irradiated onto the infrared filter 40 and transmitted to the photosensitive element 20 through the infrared filter 40. The infrared filter 40 can eliminate unnecessary light projected onto the photosensitive element 20, and prevent the photosensitive element 20 from generating false color or moire, so as to improve the effective resolution and color reproducibility thereof. In some embodiments, the infrared filter 40 may also be fixed on an end of the optical lens 10 facing the image side. Other elements included in the lens module 100 are not described in detail herein.
Referring to fig. 6, the optical lens 10 affects the imaging quality and the imaging effect, and mainly utilizes the refraction principle of the lens to perform imaging, i.e. the scene light forms a clear image on the imaging plane through the optical lens 10, and records the image of the scene through the photosensitive element 20 on the imaging plane. The imaging plane is a plane where the subject is imaged through the optical lens 10. The optical lens 10 includes a plurality of components arranged in sequence from an object side to an image side, each component includes at least one lens, and an image with a better imaging effect is formed by cooperation of the lenses in the components. The object side refers to the side of the object, and the image side refers to the side of the imaging plane.
In the present application, the optical lens 10 is a zoom lens. When the focal length of the optical lens 10 is changed, the optical lens 10 is correspondingly moved relative to the photosensitive element 20, so that the optical lens 10 can be ensured to be well imaged within the designed focal length range.
Referring to fig. 4, 6 and 7, in some embodiments, an optical lens 10 includes a first component G1, a second component G2, a third component G3 and a fourth component G4 arranged in order from an object side to an image side, where each of the first component G1 to the fourth component G4 includes at least one lens. Each lens in each group of the lenses is arranged along the optical axis, and each lens comprises an object side surface facing the object side and an image side surface facing the image side. Specifically, the image side of fourth element G4 faces photosensitive element 20, second element G2, third element G3 and fourth element G4 are coaxial, second element G2 includes refractive element G21, refractive element G21 is located on the side of second element G2 facing away from third element G3, first element G1 is located on the side of refractive element G21 facing away from bottom wall 33 and facing through hole 31, and the optical axes of third element G3 and fourth element G4 form an included angle with the optical axis of first element G1. It is understood that the optical path of optical lens 10 includes a first optical path and a second optical path, the first optical path and the second optical path form an included angle, the light ray is transmitted along the first optical path and transmitted along the second optical path after passing through refraction element G21, first component G1 is located on the first optical path, and third component G3 and fourth component G4 are located on the second optical path. In this embodiment, the included angle is 90 degrees, that is, the optical axes of the third component G3 and the fourth component G4 are perpendicular to the optical axis of the first component G1. Of course, the angle between the optical axes of third component G3 and fourth component G4 and the optical axis of first component G1 can be other degrees (0 degrees and 180 degrees are not included) between 0 degrees and 180 degrees.
Light from outside terminal 1000 passes through light passing hole 301 and through hole 31 in sequence and first component G1, is converted into light by light folding member G21, passes through lens of second component G2, third component G3 and fourth component G4 in sequence, and is finally received by photosensitive element 20. The light folding member G21 is used to change the transmission path of the light transmitted from the first component G1, the second component G2 is fixed in position relative to the imaging surface of the optical lens 10, and the first component G1, the third component G3 and the fourth component G4 can move relative to the second component G2. When first element G1 is at a distance from second element G2, first element G1 can protrude through hole 31 out of receiving space 32 and further out of housing 300 through light passing hole 301. In this embodiment, the refraction member G21 is a prism. It is understood that a prism is also a lens, and each lens of the present application, except for the prism, is a lens having positive or negative power. Of course, in other embodiments, the refraction element G21 may be a mirror or other element capable of changing the light path.
Third and fourth components G3 and G4 of the present application are movable relative to second component G2 to cooperate with first component G1 to change optical lens 10 between a tele state, an intermediate state, a wide state, and a micro-focus state. That is, third element G3 and fourth element G4 move in coordination with first element G1 during zooming, achieving a need for continuous zooming of the object distance of optical lens 10 from a telephoto state to a micro-focus state while achieving high imaging performance. It is understood that the optical lens 10 is in the telephoto state, the intermediate focus state, the wide angle state, or the micro focus state, which are all based on 135 cameras, and specifically, the equivalent focal length of the optical lens 10 is determined when the optical lens 10 is determined to be in the telephoto state, the intermediate focus state, the wide angle state, or the micro focus state, and the equivalent focal length of the optical lens 10 is (43.3 is the focal length of the optical lens 10)/the length of the diagonal line of the photosensitive element 20. The focal length of the optical lens 10 mentioned herein is the actual focal length of the optical lens 10. When the optical lens 10 is in a telephoto state, the equivalent focal length of the optical lens 10 is greater than or equal to 50cm, when the optical lens 10 is in a middle focus state, the equivalent focal length of the optical lens 10 is in a range between 25cm and 27cm (including 25cm and 27cm), when the optical lens 10 is in a wide-angle state, the equivalent focal length of the optical lens 10 is less than or equal to 24cm, and when the optical lens 10 is in a micro-focus state, the equivalent focal length of the optical lens 10 is less than or equal to 10 cm.
In the embodiment of the present application, when the optical lens 10 is operated, the first component G1, the third component G3, and the fourth component G4 are movable relative to the second component G2 by the first driving portion, the second driving portion, and the third driving portion, respectively, and since the position of the second component G2 relative to the imaging surface of the optical lens 10 is fixed, the total optical length of the optical lens 10 changes with the change in the distance between the first component G1 and the second component G2, and as the first component G1 is farther from the second component G2, the total optical length of the optical lens 10 is longer, that is, the optical lens 10 can extend out of the accommodating space 32 through the through hole 31 by moving the distance between the first component G1 and the second component G2, and further extend out of the housing 300 through the light-passing hole 301, thereby increasing the total optical length of the optical lens 10, increasing the zoom range of the optical lens 10, and improving the imaging quality of the optical lens 10. During zooming of optical lens 10, since second component G2 includes refractive element G21, refractive element G21 is configured to change a transmission route of light transmitted from first component G1, so that an optical axis of first component G1 is perpendicular to optical axes of three components G3 and fourth component G4, and first component G1 can extend out of accommodating space 32 through hole 31 and further out of housing 300 through light through hole 301, so that a distance that first component G1 moves relative to second component G2 does not increase a distance that second component G2 is away from an imaging plane of optical lens 10, but only increases a distance that first component G1 is away from second component G2, and first component G1 can extend outside terminal 1000, terminal 1000 does not need to provide an additional space for displacement of first component G1 relative to second component G2, thereby saving an internal space of terminal 1000 and achieving thinning of terminal 1000. When optical lens 10 is not in operation, first component G1 is housed within housing 30, making terminal 1000 more practical and convenient.
In some embodiments of the present application, the optical lens 10 includes a first lens barrel 1, a second lens barrel 2, a third lens barrel 3, and a fourth lens barrel 4, wherein a lens of a first component G1 is fixedly connected in the first lens barrel 1, a lens of a second component G2 and a refractive element G21 are fixedly connected in the second lens barrel 2, a lens of a third component G3 is fixedly connected in the third lens barrel 3, and a lens of a fourth component G4 is fixedly connected in the fourth lens barrel 4. The first barrel 1, the second barrel 2, the third barrel 3 and the fourth barrel 4 are used for fixing a first component G1, a second component G2, a third component G3 and a fourth component G4 respectively so as to keep the first component G1, the second component G2, the third component G3 and the fourth component G4 stably fixed in the housing 30 of the lens module 100.
In some embodiments, as shown in fig. 8, fig. 8 is a partial schematic structural diagram of another view angle of the camera module provided in fig. 3. The first lens barrel 1 of the present application includes a first portion 11 and a second portion 12 connected to the first portion 11, a first component G1 is fixed to the first portion 11, a notch 121 is formed in a side wall of the second portion 12, and the second lens barrel 2 is partially accommodated in the second portion 12 through the notch 121, so that an object-side surface of the second component G2 is opposite to an image-side surface of the first component G1. The side of the second part 12 remote from the first part 11 is connected to a first drive part 50 to drive the first barrel 1 by the first drive part 50 towards or away from the second component G2. Of course, in other embodiments, the second portion 12 may also be a bracket connected between the first portion 11 and the first driving portion 50.
Specifically, the first driving portion 50 includes a first motor 51, a second motor 52 and a transmission member 53, a first end of the transmission member 53 is connected to the first motor 51, and the other end of the transmission member 53 penetrates through a connecting block 122 on a side wall of the second portion 12 and is limited on the top wall 35, the first motor 51 drives the transmission member 53 to rotate, and the transmission member 53 rotates to drive the first lens barrel 1 to move in an axial direction of the transmission member 53, so that the first component G1 is close to or away from the second component G2. A second motor 52 is connected between the first part 11 and the first element G1 for focusing the first element G1. That is, the first motor 51 and the second motor 52 cooperate to improve the imaging quality of the optical lens 10. In this embodiment, the connecting block 122 and the second portion 12 may be integrally formed or may be fixedly connected. The transmission piece 53 is a transmission screw rod, the periphery of the transmission screw rod is provided with an external thread, the corresponding connecting block 122 is provided with an internal thread, and the transmission screw rod is in threaded connection with the connecting block 122. Of course, in other embodiments, the first driving part 50 is not only the structure described above, but may be other structures as long as it can drive the first barrel 1 away from or close to the second component G2. The transmission member 53 may be a transmission member 53 with other structures, and the connecting block 122 and the transmission member 53 may be connected by other connection methods.
In some embodiments, a connecting portion 123 is disposed on a side of second portion 12 opposite to connecting block 122, a sliding rod 124 is disposed on a side of second portion 12 opposite to driving member 53, sliding rod 124 penetrates connecting portion 123 of second portion 12, and two ends of sliding rod 124 are fixed to housing 30, so that driving member 53 drives first lens barrel 1 to move away from or close to second group G2, and first lens barrel 1 slides between two ends of sliding rod 124, thereby preventing first lens barrel 1 from shifting during moving. Meanwhile, the sliding rod 124 and the transmission piece 53 are respectively connected to two sides of the second portion 12 to maintain the balance of forces during the movement of the first barrel 1, so as to ensure that the first barrel 1 is more stable during the movement. Of course, in other embodiments, a slide bar may be disposed outside the side wall of the second portion 12 between the transmission member 53 and the slide bar 124, i.e. the number of slide bars is not limited to one. Or the second portion 12 on the opposite side of the transmission member 53 may be provided without a slide.
Specifically, a first driving section is coupled to first barrel 1 for driving first cell G1 located inside first barrel 1 to move closer to or away from second cell G2, a second driving section is coupled to third barrel 3 for driving third cell G3 located in third barrel 3 to move relative to second cell G2, and a third driving section is coupled to fourth barrel 4 for driving fourth cell G4 located in fourth barrel 4 to move fourth cell G4 between third cell G3 and the image side. The first driving part, the second driving part and the third driving part respectively adjust the positions of a first component G1, a third component G3 and a fourth component G4 as required, so that the first component G1, the second component G2, the third component G3 and the fourth component G4 are matched with each other to adjust the total optical length of the optical lens 10 as required, so that the optical lens 10 is in a long-focus state, a middle-focus state, a wide-angle state or a micro-focus state, the requirements of different application scenes on a zoom range are met, and the imaging quality of the optical lens 10 is improved.
When first, second, and third driving units drive first, third, and fourth elements G1, G3, and G4, respectively, to perform focusing, the first, second, and third driving units drive first, third, and fourth elements G1, G3, and G4, respectively, to perform relative movement therebetween, thereby performing focusing. When first, second and third driving portions respectively drive first, third and fourth elements G1, G3 and G4 to perform anti-shake, optical anti-shake is achieved by driving first, third and fourth elements G1, G3 and G4 to move or rotate relative to photosensitive element 20 and/or driving first, third and fourth elements G1, G3 and G4 to move or rotate relative to each other.
Referring to fig. 9 and 10, when the optical lens 10 zooms, the first component G1, the third component G3, and the fourth component G4 move along the optical axis respectively. Specifically, for example, when optical lens 10 is zoomed from a wide-angle state to a telephoto state, second element G2 is not moved, first element G1, third element G3, and fourth element G4 are moved toward the image side, the distance between first element G1 and second element G2 becomes larger, the distance between second element G2 and third element G3 becomes smaller, the distance between third element G3 and fourth element G4 becomes larger and smaller, and the total optical length of optical lens 10 becomes longer. When optical lens 10 is zoomed from the wide-angle state to the micro-focus state, second element G2 remains still, first element G1 moves to the image side, third element G3 and fourth element G4 move to the object side, the distance between first element G1 and second element G2 becomes smaller, the distance between second element G2 and third element G3 becomes smaller, the distance between third element G3 and fourth element G4 becomes smaller, and the total optical length of optical lens 10 becomes shorter. In the present embodiment, first element G1 extends outside housing 300 of terminal 1000 when optical lens 10 is in the tele state and the mid state, and first element G1 is housed inside terminal 1000 when optical lens 10 is in the wide state and the micro state. So as to ensure that the optical lens 10 occupies a small enough internal volume of the terminal 1000, which is beneficial to realizing the thinning of the terminal 1000. Of course, in other embodiments, optical lens 10 may extend out of housing 300 of terminal 1000 when in a wide-angle state.
In some embodiments of the present application, a difference between a chief ray angle of the optical lens 20 in the wide-angle state and a chief ray angle of the optical lens 20 in the telephoto state is less than or equal to 3 degrees, so as to ensure that no color change occurs in an image and improve the imaging quality of the optical lens 20.
In some embodiments of the present application, a difference between a chief ray angle of the optical lens 20 in the telephoto state and a chief ray angle of the optical lens 20 in the micro-focus state is less than or equal to 5 degrees, so as to ensure that an image does not have color change and improve the imaging quality of the optical lens 20.
In some embodiments of the present application, when the optical lens 10 is in the telephoto state, the optical lens 10 satisfies the following relationship:
1.0≤TTL/EFLmax≤1.7;
wherein, TTL is the total optical length of the optical lens 10, i.e. the total length from the object-side surface of the lens closest to the object side of the optical lens 10 to the image plane. EFLmax is the effective focal length of the optical lens in the telephoto state.
Generally, the effective focal length of the optical lens 10 in the telephoto state is proportional to the total optical length, and in order to achieve the miniaturization requirement, the total optical length is as small as possible, so the ratio should be as small as possible. In the present embodiment, by specifying the range of the ratio of the total optical length of the optical lens 10 to the effective focal length of the optical lens 10 in the telephoto state, the thickness of the optical lens 10 is ensured to be sufficiently small, which is advantageous for downsizing the optical lens 10, and when the optical lens 10 is applied to the terminal 1000, the terminal 1000 occupies a smaller space, thereby achieving a reduction in thickness of the terminal 1000.
In some embodiments of the present application, the optical lens 10 satisfies the following relationship:
0.01≤IH/EFLmax≤0.1;
where IH is the image height of the optical lens 10.
The ratio of the image height of the optical lens 10 to the effective focal length of the optical lens 10 in the telephoto state defined above represents the telephoto capability of the optical lens 10, that is, the capability of the optical lens 10 to capture an object image that is located far from the optical lens 10. According to the specified ratio of the image height of the optical lens 10 to the effective focal length of the optical lens 10 in the telephoto state, the telephoto capability of the optical lens 10 can be ensured, different shooting scenes can be satisfied, and the user experience can be improved.
In some embodiments of the present application, the first component G1, the second component G2, the third component G3, and the fourth component G4 all have N lenses having optical power, N is an integer greater than or equal to 7 and less than or equal to 15, and at least 7 aspheric lenses are included in the N lenses having optical power. By limiting the number of the optical lenses with the focal power of the optical lens 10 to 7-15 (including 7 and 15), the imaging effect of the optical lens 10 with a wide zooming range is better under the condition that the size of the optical lens 10 is small enough, and meanwhile, the number of the aspheric surfaces of the N optical lenses with the focal power is limited to be at least 7, so that aberration is effectively corrected, the photographing effect of the optical lens 10 is guaranteed, and user experience is improved.
In some embodiments of the present application, the amount of light passing through the lens of the first component G1, the second component G2, the third component G3 and the fourth component G4 can be increased by cutting off the edge portion, it can be understood that a three-dimensional coordinate system is established with the screen plane of the mobile phone as the X-Y plane and the thickness of the mobile phone as the Z direction, and the lens of the optical lens of the mobile phone is generally parallel to the X-Y plane, but the lens provided with the refractive element G21, the second component G2, the third component G3 and the fourth component G4 in the present application will be parallel to the X-Z plane, if the edge portion of the lens is not cut off, the diameter of the lens is limited by the thickness of the mobile phone, that is, the maximum size of the lens in X, Z cannot be larger than the thickness of the mobile phone. If a part of the lens is cut by cutting off the edge portion, a part of the lens in the Z-axis direction is cut, and the dimension in the X-direction is not limited by the thickness of the Z-axis, thereby increasing the amount of light passing. Meanwhile, the size of the optical lens 10 is effectively reduced, which is beneficial to the miniaturization of the optical lens 10, and further the thinning of the terminal 1000 is realized.
In some embodiments of the present application, the optical lens 10 satisfies the following relationship:
4mm≤φmax≤15mm;
where φ max is the diameter of the largest lens among first component G1, second component G2, third component G3, and fourth component G4.
The size of the largest lens in optical lens 10 is shown in terms of the above-specified range of diameters of the largest lens in first component G1, second component G2, third component G3, and fourth component G4. When the diameter range of the largest lens among first, second, third and fourth elements G1, G2, G3 and G4 satisfies the above-described relational expression, it is possible to contribute to downsizing of optical lens 10, occupy less space of terminal 1000 when optical lens 10 is applied to terminal 1000, and realize thinning of terminal 1000.
In the present application, different components (including first component G1, second component G2, third component G3, and fourth component G4) of optical lens 10 have different optical properties, and through cooperation between the components with different optical properties, the zoom range of optical lens 10 is sufficiently wide, optical lens 10 has a good imaging effect, and terminal 1000 is thinned. In some embodiments of the present application, first element G1 has a positive optical power, second element G2 has a negative optical power, third element G3 has a positive optical power, fourth element G4 has a positive optical power, and first element G1, second element G2, third element G3, and fourth element G4 cooperate to provide the desired optical lens 20 to enable optical lens 20 to achieve higher quality imaging.
In the present application, in order to enable the optical lens 10 to obtain the required optical performance, so that the zoom range of the optical lens 10 is wide enough, the components are mutually matched to enable the optical lens 10 to have a good imaging effect, and the terminal 1000 is thinned. Each lens within each component has a different optical property.
In some embodiments of the present application, the first component G1 satisfies the following relationship:
1.0≦|fs1/ft|≦1.7;
wherein fs is1Is the focal length of the first component G1, and ft is the focal length of the optical lens 10 in the telephoto state.
The above relation defines the range of the ratio of the focal length of the first element G1 to the focal length of the optical lens 10 in the telephoto state, and in the present embodiment, when the range of the ratio of the focal length of the first element G1 to the focal length of the optical lens 10 in the telephoto state satisfies the above relation, the first element G1 can be easily matched with other lenses to obtain the desired optical lens 10, so that the optical lens 10 has a wider zoom range and can obtain better imaging.
In some embodiments of the present application, the second element G2 has a negative power, and the second element G2 satisfies the following relationship:
0.1≦|fs2/ft|≦0.7;
wherein fs is2Is the focal length of the second group G2, and ft is the focal length of the optical lens 10 in the telephoto state.
The above relation defines the range of the ratio of the focal length of the second element G2 to the focal length of the optical lens 10 in the telephoto state, and in the present embodiment, when the range of the ratio of the focal length of the second element G2 to the focal length of the optical lens 10 in the telephoto state satisfies the above relation, the second element G2 can be easily matched with other lenses to obtain the desired optical lens 10, so that the optical lens 10 has a wider zoom range and can obtain better imaging.
In some embodiments of the present application, the third element G3 has positive optical power, and the third element G3 satisfies the following relationship:
0.1≦|fs3/ft|≦0.7;
wherein fs is3Is the focal length of the third component G3, and ft is the focal length of the optical lens 10 in the telephoto state.
The above relation defines the range of the ratio of the focal length of the third component G3 to the focal length of the optical lens 10 in the telephoto state, and in the present embodiment, when the range of the ratio of the focal length of the third component G3 to the focal length of the optical lens 10 in the telephoto state satisfies the above relation, the third component G3 can be easily matched with other lenses to obtain the desired optical lens 10, so that the optical lens 10 has a wider zoom range and can obtain better imaging.
In some embodiments of the present application, fourth component G4 has positive optical power and fourth component G4 satisfies the following relationship:
0.3≦|fs4/ft|≦0.9;
wherein fs is4Is the focal length of the fourth component G4, and ft is the focal length of the optical lens 10 in the telephoto state.
The above relation specifies the range of the ratio of the focal length of fourth component G4 to the focal length of optical lens 10 in the telephoto state, and fourth component G4 is mainly used to correct the aberration of the optical system, thereby improving the imaging quality. In addition, in the present embodiment, when the range of the ratio of the focal length of the fourth component G4 to the focal length of the optical lens 10 in the telephoto state satisfies the above relational expression, it is possible to easily obtain a desired optical lens 10 by matching the fourth component G4 with other lenses, so that the optical lens 10 has a wider zoom range and can obtain a better image.
In some embodiments of the present application, fourth component G4 comprises a cemented lens. The glued lens is formed by combining two lenses into one lens through physical connection glue. By providing the cemented lens in the fourth component G4, it is possible to facilitate correction of spherical aberration and chromatic aberration of the optical lens 10, so that the optical lens 10 can obtain better imaging quality.
In some embodiments of the present application, the optical lens 10 includes a stop, and the stop is located on the object side of the third component G3, that is, the stop is located between the second component G2 and the third component G3, so as to limit the size of the light beam transmitted from the second component G2 to the third component G3, and ensure that the optical lens 10 achieves better imaging effect. Of course, in other embodiments, the diaphragm can also be arranged between other adjacent components. In some embodiments of the present application, the image-side surface and the object-side surface of each lens are aspheric, and the image-side surface and the object-side surface of each lens satisfy the following formula:
Figure BDA0002606371440000141
wherein z is the rise of the aspheric surface, r is the radial coordinate of the aspheric surface, c is the curvature of the aspheric surface vertex sphere, K is the conic constant, and a2, A3, a4, a5 and a6 are aspheric coefficients.
Through the above relational expression, to obtain different aspheric surface lenses, make different lenses can realize different optical effects, thereby realize good shooting effect through the cooperation of each different aspheric surface lens.
According to the relations and ranges given in some embodiments of the present application, by the combination of the arrangement of the lenses in each group of the lenses and the lenses having specific optical designs, the zoom range of the optical lens 10 can be made wide enough, and the optical lens 10 can have good imaging effect, while achieving the thinning of the terminal 1000.
Some specific, but non-limiting examples of embodiments of the present application will be described in more detail below in conjunction with fig. 11-55.
Referring to fig. 11, fig. 11 is a schematic structural diagram of an optical lens 10 according to a first embodiment of the present application. In this embodiment, the optical lens 10 includes four elements, namely, a first element G1, a second element G2, a third element G3, and a fourth element G4, and the first element G1, the second element G2, the third element G3, and the fourth element G4 are arranged in this order from the object side to the image side. In order to facilitate understanding of the moving relationship of first component G1, second component G2, third component G3 and fourth component G4, fig. 11 shows first component G1, second component G2, third component G3 and fourth component G4 as being coaxially arranged, and refractor G21 in fig. 11 does not represent an actual structure, and is merely an example. In fact, second component G2, third component G3 and fourth component G4 are coaxial, refractor G21 is located on the side of second component G2 facing away from third component G3, and first component G1 is located on the side of refractor G21 facing away from bottom wall 33.
When the optical lens 10 is in the telephoto state, that is, when the optical lens 10 is in the telephoto state, the ratio (TTL/EFLmax) of the focal length of the first element G1 to the focal length of the optical lens 10 in the telephoto state is 1.221. The ratio (IH/EFLmax) of the image height of the optical lens 10 to the focal length of the optical lens 10 in the telephoto state is 0.099. The limiting value ensures that the thickness of the optical lens 10 is small enough, which is beneficial to the miniaturization of the optical lens 10, and when the optical lens 10 is applied to the terminal 1000, the terminal 1000 occupies a smaller space, so that the terminal 1000 is thin, and meanwhile, the optical lens 10 can ensure the telephoto capability of the optical lens 10, thereby meeting different shooting scenes and improving the user experience.
The first element G1 has positive optical power, and the ratio | fs of the focal length of the first element G1 to the focal length of the optical lens 10 in the telephoto state1The/ft | is 1.40; the second element G2 has negative power, and the ratio | fs of the focal length of the second element G2 to the focal length of the optical lens 10 in the telephoto state2Ft | is 0.28; the third component G3 has positive optical power, and the ratio | fs of the focal length of the third component G3 to the focal length of the optical lens 10 in the telephoto state3The/ft | is 0.30; the fourth cell G4 has positive optical power, and the ratio | fs of the focal length of the fourth cell G4 to the focal length of the optical lens 10 in the telephoto state4The/ft | is 0.67. By matching the components with different optical properties, the zoom range of the optical lens 10 is wide enough, the optical lens 10 has a good imaging effect, and the terminal 1000 is thin.
The optical lens 10 includes eleven lenses. Specifically, the first component G1 includes a first lens G11, and the first lens of the first component G1 is the first lens G11; second component G2 includes refractive element G21, second lens G22 and third lens G23, the first lens of second component G2 is refractive element G21, the second lens of second component G2 is second lens G22, and the third lens of second component G2 is third lens G23; third component G3 includes fourth lens G31, fifth lens G32, sixth lens G33 and seventh lens G34, the first lens of third component G3 is fourth lens G31, the second lens of third component G3 is fifth lens G32, the third lens of third component G3 is sixth lens G33, and the fourth lens of third component G3 is seventh lens G34; fourth component G4 includes eighth lens G41, ninth lens G42 and tenth lens G43, the first lens of fourth component G4 is eighth lens G41, the second lens of fourth component G4 is ninth lens G42, and the third lens of fourth component G4 is tenth lens G43. In the present embodiment, the diameter of the largest lens in the optical lens 10 is 13.74mm to ensure the miniaturization of the optical lens 10.
The first lens G11 has positive focal power, the second lens G22 has positive focal power, the third lens G23 has negative focal power, the fourth lens G31 has positive focal power, the fifth lens G32 has positive focal power, the sixth lens G33 has negative focal power, the seventh lens G34 has negative focal power, the eighth lens G41 has positive focal power, the ninth lens G42 has negative focal power, and the tenth lens G43 has positive focal power. Through the cooperation of different lenses, the zoom range of the optical lens 10 is wide enough, the optical lens 10 has a good imaging effect, and the terminal 1000 is thinned.
Referring to fig. 12 and 13, in the present embodiment, when the optical lens 10 zooms, the first component G1, the third component G3, and the fourth component G4 move along the optical axis respectively. Specifically, for example, when optical lens 10 is zoomed from a wide-angle state to a telephoto state, second element G2 is not moved, first element G1, third element G3, and fourth element G4 are moved toward the image side, the distance between first element G1 and second element G2 becomes larger, the distance between second element G2 and third element G3 becomes smaller, the distance between third element G3 and fourth element G4 becomes larger and smaller, and the total optical length of optical lens 10 becomes longer. When optical lens 10 is zoomed from the wide-angle state to the micro-focus state, second element G2 remains still, first element G1 moves to the image side, third element G3 and fourth element G4 move to the object side, the distance between first element G1 and second element G2 becomes smaller, the distance between second element G2 and third element G3 becomes smaller, the distance between third element G3 and fourth element G4 becomes smaller, and the total optical length of optical lens 10 becomes shorter.
The basic parameters of the first embodiment of the present application are as shown in table 1 below according to the above relations.
Table 1 basic parameters of the optical lens 10 of the first embodiment
Figure BDA0002606371440000151
Figure BDA0002606371440000161
Wherein the meaning of each symbol in the table is as follows.
W: the optical lens 10 is in a wide-angle state.
C: the optical lens 10 is in a middle focus state.
T: the optical lens 10 is in a telephoto state.
M: the optical lens 10 is in a micro-focus state.
f: the total focal length of the optical lens 10.
Extension length: the distance between the first component G1 and the second component G2.
Fixed length: the distance between the light folding piece G21 and the photosensitive element 20.
It should be noted that, unless otherwise stated, the meaning of each symbol in the present application indicates the same meaning when appearing again in the following, and will not be described again.
Table 2 shows the radius of curvature, thickness, refractive index, and abbe number of each constituent lens of the optical lens 10 in the first embodiment of the present application, as shown in table 2.
TABLE 2 radius of curvature, thickness, refractive index, Abbe number of each constituent lens of the optical lens 10 of the first embodiment
Figure BDA0002606371440000162
Figure BDA0002606371440000171
In the above table, the meanings of the symbols in the table are as follows.
R1: radius of curvature of the object side of the first lens G11.
R2: radius of curvature of the image side of the first lens G11.
R3: radius of curvature of the object side of the light folding member G21.
R4: radius of curvature of image side of the folder G21.
R5: radius of curvature of the object side of the second lens G22.
R6: the radius of curvature of the image side of the second lens G22.
R7: radius of curvature of the object side of the third lens G23.
R8: radius of curvature of the image side of the third lens G23.
R9: radius of curvature of the object side of the fourth lens G31.
R10: the radius of curvature of the image side of the fourth lens G31.
R11: radius of curvature of the object side of the fifth lens G32.
R12: the radius of curvature of the image side of the fifth lens G32.
R13: radius of curvature of the object side of the sixth lens G33.
R14: the radius of curvature of the image side of the sixth lens G33.
R15: radius of curvature of the object side of the seventh lens G34.
R16: the radius of curvature of the image side of the seventh lens G34.
R17: radius of curvature of the object side of the eighth lens G41.
R18: the radius of curvature of the image side of the eighth lens G41.
R19: radius of curvature of the object side of the ninth lens G42.
R20: the radius of curvature of the image side of the ninth lens G42.
R21: radius of curvature of the object side of the tenth lens G43.
R22: the radius of curvature of the image side of the tenth lens G43.
R23: the radius of curvature of the object side of the infrared filter 40.
R24: the radius of curvature of the image side of the infrared filter 40.
d 1: the on-axis thickness of the first lens G11.
d 2: the on-axis thickness of the flap G21.
d 3: the on-axis thickness of the second lens G22.
d 4: the on-axis thickness of the third lens G23.
d 5: the on-axis thickness of the fourth lens G31.
d 6: the on-axis thickness of the fifth lens G32.
d 7: the on-axis thickness of the sixth lens G33.
d 8: the on-axis thickness of the seventh lens G34.
d 9: the on-axis thickness of the eighth lens G41.
d 10: the on-axis thickness of the ninth lens G42.
d 11: the on-axis thickness of the tenth lens G43.
d 12: on-axis thickness of the filter.
a 1: the axial distance between the image side surface of the first lens G11 and the object side surface of the refraction element G21.
a 2: the image side of the light folding piece G21 is at an on-axis distance from the object side of the second lens G22.
a 3: the on-axis distance between the image-side surface of the second lens G22 and the object-side surface of the third lens G23.
a 4: the on-axis distance between the image-side surface of the third lens G23 and the object-side surface of the fourth lens G31.
a 5: the on-axis distance between the image-side surface of the fourth lens G31 and the object-side surface of the fifth lens G32.
a 6: the on-axis distance between the image-side surface of the fifth lens G32 and the object-side surface of the sixth lens G33.
a 7: the on-axis distance between the image-side surface of the sixth lens G33 and the object-side surface of the seventh lens G34.
a 8: the on-axis distance between the image-side surface of the seventh lens G34 and the object-side surface of the eighth lens G41.
a 9: the on-axis distance between the image-side surface of the eighth lens G41 and the object-side surface of the ninth lens G42.
a 10: the image-side surface of the ninth lens G42 is at an on-axis distance from the object-side surface of the tenth lens G43.
a 11: the image-side surface of the tenth lens G43 is on-axis distant from the object-side surface of the infrared filter 40.
a 12: the image side of the infrared filter 40 is axially spaced from the object side of the photosensitive element 20.
n 1: refractive index of the first lens G11.
n 2: refractive index of the light refracting member G21.
n 3: refractive index of the second lens G22.
n 4: refractive index of the third lens G23.
n 5: refractive index of the fourth lens G31.
n 6: refractive index of the fifth lens G32.
n 7: refractive index of the sixth lens G33.
n 8: refractive index of the seventh lens G34.
n 9: refractive index of the eighth lens G41.
n 10: refractive index of the ninth lens G42.
n 11: the refractive index of the tenth lens G43.
n 12: refractive index of the infrared filter 40.
v 1: abbe number of the first lens G11.
v 2: abbe number of the light folding piece G21.
v 3: abbe number of the second lens G22.
v 4: abbe number of the third lens G23.
v 5: abbe number of the fourth lens G31.
v 6: abbe number of the fifth lens G32.
v 7: abbe number of the sixth lens G33.
v 8: abbe number of the seventh lens G34.
v 9: abbe number of the eighth lens G41.
v 10: abbe number of the ninth lens G42.
v 11: abbe number of the tenth lens G43.
v 12: abbe number of the infrared filter 40.
It should be noted that, unless otherwise noted, the meaning of each symbol in the present application indicates the same meaning when appearing again in the following, and will not be described again. The positive and negative of the curvature radius indicate that the optical surface is convex towards the object side or convex towards the image side, and when the optical surface (including the object side surface or the image side surface) is convex towards the object side, the curvature radius of the optical surface is a positive value; when the optical surface (including the object side surface or the image side surface) is convex toward the image side, the optical surface is concave toward the object side, and the radius of curvature of the optical surface is negative.
Table 3 shows aspheric coefficients of the optical lens 10 of the present embodiment, and the number of aspheric surfaces in the optical lens 10 of the present embodiment is 14, specifically, as shown in table 3.
Table 3 aspherical surface coefficients of the optical lens 10 of the first embodiment
Type (B) K A2 A3 A4 A5 A6
R1 Even aspheric surface 0.00E+00 5.03E-05 1.95E-07 6.80E-09 -2.03E-10 1.16E-12
R2 Even aspheric surface 0.00E+00 6.56E-05 1.77E-07 4.53E-09 -2.02E-10 1.37E-12
R5 Even aspheric surface 0.00E+00 -4.38E-03 1.27E-04 5.52E-06 -6.16E-07 4.52E-08
R6 Even aspheric surface 0.00E+00 -3.59E-03 -2.24E-06 1.54E-05 -9.07E-07 4.69E-08
R7 Even aspheric surface 0.00E+00 -2.60E-03 1.34E-04 -1.47E-05 1.60E-06 -5.94E-08
R8 Even aspheric surface 0.00E+00 -5.58E-03 4.59E-04 -4.44E-05 2.81E-06 -7.92E-08
R11 Even aspheric surface 0.00E+00 2.47E-05 8.18E-05 3.67E-06 2.82E-07 -3.42E-08
R12 Even aspheric surface 0.00E+00 1.88E-03 8.68E-05 1.77E-06 -1.23E-06 3.62E-08
R13 Even aspheric surface 0.00E+00 3.56E-03 -3.28E-05 8.45E-06 -1.96E-06 3.82E-08
R14 Even aspheric surface 0.00E+00 -1.32E-03 7.13E-04 7.22E-05 3.20E-06 -1.58E-07
R15 Even aspheric surface 0.00E+00 8.63E-04 3.95E-04 6.81E-05 2.16E-06 -9.15E-07
R16 Even aspheric surface 0.00E+00 7.88E-03 -3.22E-05 -5.18E-06 5.83E-07 -7.43E-07
R21 Even aspheric surface 0.00E+00 1.40E-03 3.55E-07 2.98E-05 -3.41E-06 2.40E-07
R22 Even aspheric surface 0.00E+00 1.85E-03 -4.37E-05 4.86E-05 -5.89E-06 4.02E-07
Where K is a conic constant, and symbols a2, A3, a4, a5, a6, and the like represent aspheric coefficients. Each parameter in the table is represented by a scientific notation. For example, -1.07E-01 means-1.07X 10-1(ii) a 4.11E-02 means 4.11X 10-2. It should be noted that, when the symbols K, A2, A3, a4, a5, a6 and the like in the present application appear again later, unless otherwise explained, the meanings are the same as those herein, and are not described again later.
By substituting the above parameters into the formula:
Figure BDA0002606371440000191
that is, each lens of the optical lens 10 of the present embodiment can be designed, where z is the rise of the aspheric surface, r is the radial coordinate of the aspheric surface, and c is the aspheric vertex sphere curvature.
In the present embodiment, different lenses of the optical lens 10 designed by the above parameters can respectively perform different functions, so that the optical lens 10 with good imaging quality can be obtained by matching the lenses.
Table 4 shows the object distances and the element intervals in the telephoto state, the intermediate focus state, the wide angle state, and the micro-focus state of the optical lens 10 of the present embodiment, as shown in table 4.
Table 4 object distances and component intervals in the telephoto state, the intermediate focus state, the wide angle state, and the micro-focus state of the optical lens 10 of the first embodiment
W C T M
a0 Inf Inf Inf 50mm
a1 1.07mm 6.84mm 9.30mm 0.10mm
a4 7.16mm 3.35mm 0.83mm 6.94mm
a8 3.30mm 4.71mm 3.40mm 0.81mm
a11 0.53mm 2.93mm 6.76mm 3.25mm
Fig. 14 to 25 are characteristic diagrams of optical performance of the optical lens 10 of the first embodiment.
Specifically, fig. 14 shows axial aberrations of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, passing through the optical lens 10 of the first embodiment in the telephoto state of the optical lens 10. Fig. 15 shows axial aberrations of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens 10 of the first embodiment in the intermediate focus state of the optical lens 10. Fig. 16 shows axial aberrations of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens 10 of the first embodiment in the wide-angle state of the optical lens 10. Fig. 17 shows axial aberrations of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens 10 of the first embodiment in a micro-focus state of the optical lens 10. The ordinate of fig. 14-17 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction, in millimeters. As can be seen from fig. 14 to 17, in the present embodiment, the axial aberration of the optical lens 10 in each state is controlled within a small range.
Fig. 18 shows lateral chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens 10 of the first embodiment in the telephoto state of the optical lens 10. Fig. 19 shows lateral chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens 10 of the first embodiment in the intermediate focus state of the optical lens 10. Fig. 20 shows lateral chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens 10 of the first embodiment in the wide-angle state of the optical lens 10. Fig. 21 shows lateral chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens 10 of the first embodiment in a micro-focus state of the optical lens 10. The ordinate of fig. 18-21 represents field angle in degrees (°) and the abscissa in microns (μm), with the unlabeled dashed line representing the diffraction limit. The broken line in fig. 18 to 21 indicates the diffraction limit range of the optical lens 10. As is apparent from fig. 18 to 21, the lateral chromatic aberration of the optical lens 10 after the light of each wavelength in each state passes through the optical lens 10 of the first embodiment is substantially within the diffraction limit, that is, the lateral chromatic aberration of the optical lens 10 after the light of each wavelength in each state passes through the optical lens 10 of the first embodiment does not substantially affect the imaging quality of the optical lens 10.
Fig. 22 to 25 respectively show optical distortion diagrams of the optical lens 10 in a telephoto state, a middle focus state, a wide angle state, and a micro focus state, which represent differences between imaging distortions and ideal shapes after light passes through the optical lens 10. In the left diagrams in fig. 22-25, the solid lines are field curvature diagrams in the meridional direction after passing through the optical lens 10 by 555nm light in a telephoto state, a middle focus state, a wide angle state, and a micro focus state, respectively; in fig. 22-fig. 25, dotted lines are field curvature diagrams in the sagittal direction after passing through the optical lens 10 for 555nm light in the telephoto state, the intermediate focus state, the wide angle state, and the micro-focus state, respectively. Fig. 22 to 25 show, on the right side, optical distortion diagrams of 555nm light passing through the optical lens 10 according to the first embodiment in the telephoto state, the intermediate focus state, the wide angle state, and the micro-focus state, respectively. As can be seen from fig. 22 to 25, in the present embodiment, the optical system controls distortion within a visual range.
The optical lens 10 provided in the present embodiment can make the optical lens 10 compact and have a sufficiently wide zoom range, and make the optical lens 10 have a good imaging effect, while realizing the thinning of the terminal 1000, by a combination of the arrangement of each lens in each group and the lens having a specific optical design.
Referring to fig. 26, fig. 26 is a schematic structural diagram of an optical lens 10 according to a second embodiment of the present application. In this embodiment, the optical lens 10 includes four elements, namely, a first element G1, a second element G2, a third element G3, and a fourth element G4, and the first element G1, the second element G2, the third element G3, and the fourth element G4 are arranged in this order from the object side to the image side. In fig. 26, in order to facilitate understanding of the moving relationship of first component G1, second component G2, third component G3 and fourth component G4, first component G1, second component G2, third component G3 and fourth component G4 are coaxially arranged, and refractor G21 in fig. 26 does not represent an actual structure, and is merely exemplary. In fact, second component G2, third component G3 and fourth component G4 are coaxial, refractor G21 is located on the side of second component G2 facing away from third component G3, and first component G1 is located on the side of refractor G21 facing away from bottom wall 33.
When the optical lens 10 is in the telephoto state, that is, when the optical lens 10 is in the telephoto state, the ratio (TTL/EFLmax) of the focal length of the first element G1 to the focal length of the optical lens 10 in the telephoto state is 1.478. The ratio (IH/EFLmax) of the image height of the optical lens 10 to the focal length of the optical lens 10 in the telephoto state is 0.097. The limiting value ensures that the thickness of the optical lens 10 is small enough, which is beneficial to the miniaturization of the optical lens 10, and when the optical lens 10 is applied to the terminal 1000, the terminal 1000 occupies a smaller space, so that the terminal 1000 is thin, and meanwhile, the optical lens 10 can ensure the telephoto capability of the optical lens 10, thereby meeting different shooting scenes and improving the user experience.
The first element G1 has positive optical power, and the ratio | fs of the focal length of the first element G1 to the focal length of the optical lens 10 in the telephoto state1The/ft | is 1.49; the second element G2 has negative power, and the ratio | fs of the focal length of the second element G2 to the focal length of the optical lens 10 in the telephoto state2The/ft | is 0.301; the third component G3 has positive optical power, and the ratio | fs of the focal length of the third component G3 to the focal length of the optical lens 10 in the telephoto state3Ft | is 0.313; the fourth cell G4 has positive optical power, and the ratio | fs of the focal length of the fourth cell G4 to the focal length of the optical lens 10 in the telephoto state4The/ft | is 0.723. By matching the components with different optical properties, the zoom range of the optical lens 10 is wide enough, the optical lens 10 has a good imaging effect, and the terminal 1000 is thin.
The optical lens 10 includes twelve lenses. Specifically, the first component G1 includes a first lens G11, and the first lens of the first component G1 is the first lens G11; second component G2 includes refractive element G21, second lens G22, third lens G23 and eleventh lens G24, the first lens of second component G2 is refractive element G21, the second lens of second component G2 is second lens G22, the third lens of second component G2 is third lens G23, and the fourth lens of second component G2 is eleventh lens G24; third component G3 includes fourth lens G31, fifth lens G32, sixth lens G33 and seventh lens G34, the first lens of third component G3 is fourth lens G31, the second lens of third component G3 is fifth lens G32, the third lens of third component G3 is sixth lens G33, and the fourth lens of third component G3 is seventh lens G34; fourth component G4 includes fourth lens G31, eighth lens G41, ninth lens G42 and tenth lens G43, the first lens of fourth component G4 is eighth lens G41, the second lens of fourth component G4 is ninth lens G42, and the third lens of fourth component G4 is tenth lens G43. In the present embodiment, the diameter of the largest lens in the optical lens 10 is 12.79mm to ensure the miniaturization of the optical lens 10.
The first lens G11 has positive focal power, the second lens G22 has positive focal power, the third lens G23 has negative focal power, the fourth lens G31 has positive focal power, the fifth lens G32 has positive focal power, the sixth lens G33 has negative focal power, the seventh lens G34 has negative focal power, the eighth lens G41 has positive focal power, the ninth lens G42 has negative focal power, the tenth lens G43 has positive focal power, and the eleventh lens G24 has negative focal power. Through the cooperation of different lenses, the zoom range of the optical lens 10 is wide enough, the optical lens 10 has a good imaging effect, and the terminal 1000 is thinned.
Referring to fig. 27 and 28, in the present embodiment, when the optical lens 10 zooms, the first component G1, the third component G3, and the fourth component G4 move along the optical axis respectively. Specifically, for example, when optical lens 10 is zoomed from a wide-angle state to a telephoto state, second element G2 is not moved, first element G1, third element G3, and fourth element G4 are moved toward the image side, the distance between first element G1 and second element G2 becomes larger, the distance between second element G2 and third element G3 becomes smaller, the distance between third element G3 and fourth element G4 becomes larger and smaller, and the total optical length of optical lens 10 becomes longer. When optical lens 10 is zoomed from the wide-angle state to the micro-focus state, second element G2 remains still, first element G1 moves to the image side, third element G3 and fourth element G4 move to the object side, the distance between first element G1 and second element G2 becomes smaller, the distance between second element G2 and third element G3 becomes smaller, the distance between third element G3 and fourth element G4 becomes smaller, and the total optical length of optical lens 10 becomes shorter.
The basic parameters of the second embodiment of the present application are as shown in table 5 below according to the above relations.
Table 5 basic parameters of the optical lens 10 of the second embodiment
Figure BDA0002606371440000221
Table 6 shows the radius of curvature, thickness, refractive index, and abbe number of each constituent lens of the optical lens 10 in the second embodiment of the present application, as shown in table 6.
TABLE 6 radius of curvature, thickness, refractive index, Abbe number of each constituent lens of the optical lens 10 of the second embodiment
Figure BDA0002606371440000222
Figure BDA0002606371440000231
In the above table, the meanings of the symbols in the table are as follows.
R25: radius of curvature of the object side of the eleventh lens G24.
R26: the radius of curvature of the image side of the eleventh lens G24.
d 13: the on-axis thickness of the eleventh lens G24.
a 4: the on-axis distance between the image-side surface of the third lens G23 and the object-side surface of the eleventh lens G24.
a 13: the on-axis distance between the image-side surface of the eleventh lens G24 and the object-side surface of the fourth lens G31.
n 13: refractive index of the eleventh lens G24.
v 13: abbe number of the eleventh lens G24.
Table 7 shows aspheric coefficients of the optical lens 10 of the present embodiment, and the number of aspheric surfaces in the optical lens 10 of the present embodiment is 15, specifically, as shown in table 7.
Table 7 aspherical surface coefficients of optical lens 10 of the second embodiment
Type (B) K A2 A3 A4 A5 A6
R1 Even aspheric surface 0.00E+00 5.03E-05 1.95E-07 6.80E-09 -2.03E-10 1.16E-12
R2 Even aspheric surface 0.00E+00 6.56E-05 1.77E-07 4.53E-09 -2.02E-10 1.37E-12
R5 Even aspheric surface 0.00E+00 -4.38E-03 1.27E-04 5.52E-06 -6.16E-07 4.52E-08
R6 Even aspheric surface 0.00E+00 -3.59E-03 -2.24E-06 1.54E-05 -9.07E-07 4.69E-08
R7 Even aspheric surface 0.00E+00 -2.60E-03 1.34E-04 -1.47E-05 1.60E-06 -5.94E-08
R8 Even aspheric surface 0.00E+00 -5.58E-03 4.59E-04 -4.44E-05 2.81E-06 -7.92E-08
R11 Even aspheric surface 0.00E+00 2.47E-05 8.18E-05 3.67E-06 2.82E-07 -3.42E-08
R12 Even aspheric surface 0.00E+00 1.88E-03 8.68E-05 1.77E-06 -1.23E-06 3.62E-08
R13 Even aspheric surface 0.00E+00 3.56E-03 -3.28E-05 8.45E-06 -1.96E-06 3.82E-08
R14 Even aspheric surface 0.00E+00 -1.32E-03 7.13E-04 7.22E-05 3.20E-06 -1.58E-07
R15 Even aspheric surface 0.00E+00 8.63E-04 3.95E-04 6.81E-05 2.16E-06 -9.15E-07
R16 Even aspheric surface 0.00E+00 7.88E-03 -3.22E-05 -5.18E-06 5.83E-07 -7.43E-07
R21 Even aspheric surface 0.00E+00 1.40E-03 3.55E-07 2.98E-05 -3.41E-06 2.40E-07
R22 Even aspheric surface 0.00E+00 1.85E-03 -4.37E-05 4.86E-05 -5.89E-06 4.02E-07
By substituting the above parameters into the formula:
Figure BDA0002606371440000241
that is, each lens of the optical lens 10 of the present embodiment can be designed, where z is the rise of the aspheric surface, r is the radial coordinate of the aspheric surface, and c is the aspheric vertex sphere curvature.
In the present embodiment, different lenses of the optical lens 10 designed by the above parameters can respectively perform different functions, so that the optical lens 10 with good imaging quality can be obtained by matching the lenses.
Table 8 shows object distances and component intervals in the telephoto state, the intermediate focus state, the wide angle state, and the micro-focus state of the optical lens 10 of the present embodiment, as shown in table 8.
Table 8 object distances and component intervals in the telephoto state, the intermediate focus state, the wide angle state, and the micro-focus state of the optical lens 10 of the second embodiment
W C T M
a0 Inf Inf Inf 50mm
a1 0.13mm 6.69mm 9.85mm 0.12mm
a13 6.73mm 3.26mm 0.73mm 7.24mm
a8 3.44mm 4.81mm 3.86mm 0.43mm
a11 0.71mm 2.81mm 6.29mm 3.20mm
Fig. 29 to 40 are characteristic diagrams of the optical performance of the optical lens 10 of the second embodiment.
Specifically, fig. 29 shows axial aberrations of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm in the telephoto state of the optical lens 10 after passing through the optical lens 10 of the second embodiment. Fig. 30 shows axial aberrations of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm in the intermediate focus state of the optical lens 10 after passing through the optical lens 10 of the second embodiment. Fig. 31 shows axial aberrations of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens 10 of the second embodiment in the wide-angle state of the optical lens 10. Fig. 32 shows axial aberrations of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm in the micro-focus state of the optical lens 10 after passing through the optical lens 10 of the second embodiment. The ordinate of fig. 29-32 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction, in millimeters. As can be seen from fig. 29 to 32, in the present embodiment, the axial aberration of the optical lens 10 in each state is controlled within a small range.
Fig. 33 shows lateral chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens 10 of the second embodiment in the telephoto state of the optical lens 10. Fig. 34 shows lateral chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens 10 of the second embodiment in the intermediate focus state of the optical lens 10. Fig. 35 shows lateral chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens 10 of the second embodiment in the wide-angle state of the optical lens 10. Fig. 36 shows lateral chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens 10 of the second embodiment in a micro-focus state of the optical lens 10. The ordinate of fig. 33-36 represents the field angle in degrees (°) and the abscissa in microns (μm). The dashed lines not labeled in fig. 32 to 35 indicate the diffraction limit ranges of the optical lens 10. As is apparent from fig. 33 to 36, the lateral chromatic aberration of the optical lens 10 after passing the optical lens 10 of the second embodiment through the light of each wavelength in each state of the optical lens 10 is substantially within the diffraction limit, that is, the lateral chromatic aberration of the optical lens 10 after passing the optical lens 10 of the second embodiment through the light of each wavelength in each state of the optical lens 10 does not substantially affect the imaging quality of the optical lens 10.
Fig. 37 to 40 are schematic diagrams showing optical distortion of the optical lens 10 in a telephoto state, a middle focus state, a wide angle state, and a micro focus state, respectively, for representing a difference between an imaging distortion and an ideal shape after light passes through the optical lens 10. In the left diagrams in fig. 37 to 40, the solid lines are field curvature diagrams in the meridional direction after passing through the optical lens 10, of 555nm light in a telephoto state, a middle focus state, a wide angle state, and a micro focus state, respectively; in fig. 37-40, dotted lines are field curvature diagrams in the sagittal direction after passing through the optical lens 10 for 555nm light in the telephoto state, the intermediate focus state, the wide angle state, and the micro-focus state, respectively. Fig. 37 to the right of fig. 40 are schematic diagrams of optical distortion of 555nm light in a telephoto state, a middle focus state, a wide angle state, and a micro focus state, respectively, after passing through the optical lens 10 of the second embodiment. As can be seen from fig. 37 to 40, in the present embodiment, the optical system controls distortion within a visual range.
The optical lens 10 provided in the present embodiment can make the optical lens 10 compact and have a sufficiently wide zoom range, and make the optical lens 10 have a good imaging effect, while realizing the thinning of the terminal 1000, by a combination of the arrangement of each lens in each group and the lens having a specific optical design.
Referring to fig. 41, fig. 41 is a schematic structural diagram of an optical lens 10 according to a third embodiment of the present application. In this embodiment, the optical lens 10 includes four elements, namely, a first element G1, a second element G2, a third element G3, and a fourth element G4, and the first element G1, the second element G2, the third element G3, and the fourth element G4 are arranged in this order from the object side to the image side. In fig. 41, in order to facilitate understanding of the moving relationship of first component G1, second component G2, third component G3 and fourth component G4, first component G1, second component G2, third component G3 and fourth component G4 are coaxially arranged, and refractor G21 in fig. 41 does not represent an actual structure, and is merely exemplary. In fact, second component G2, third component G3 and fourth component G4 are coaxial, refractor G21 is located on the side of second component G2 facing away from third component G3, and first component G1 is located on the side of refractor G21 facing away from bottom wall 33.
When the optical lens 10 is in the telephoto state, that is, when the optical lens 10 is in the telephoto state, a ratio (TTL/EFLmax) of a focal length of the first element G1 to a focal length of the optical lens 10 in the telephoto state is 1.488. The ratio (IH/EFLmax) of the image height of the optical lens 10 to the focal length of the optical lens 10 in the telephoto state is 0.097. The limiting value ensures that the thickness of the optical lens 10 is small enough, which is beneficial to the miniaturization of the optical lens 10, and when the optical lens 10 is applied to the terminal 1000, the terminal 1000 occupies a smaller space, so that the terminal 1000 is thin, and meanwhile, the optical lens 10 can ensure the telephoto capability of the optical lens 10, thereby meeting different shooting scenes and improving the user experience.
The first element G1 has positive optical power, and the ratio | fs of the focal length of the first element G1 to the focal length of the optical lens 10 in the telephoto state1The/ft | is 1.38; the second element G2 has negative power, and the ratio | fs of the focal length of the second element G2 to the focal length of the optical lens 10 in the telephoto state2Ft | is 0.27; the third component G3 has positive optical power, and the ratio | fs of the focal length of the third component G3 to the focal length of the optical lens 10 in the telephoto state3The/ft | is 0.29; the fourth cell G4 has positive optical power, and the ratio | fs of the focal length of the fourth cell G4 to the focal length of the optical lens 10 in the telephoto state4The/ft | is 0.65. By matching the components with different optical properties, the zoom range of the optical lens 10 is wide enough, the optical lens 10 has a good imaging effect, and the terminal 1000 is thin.
The optical lens 10 includes eleven lenses. Specifically, the first component G1 includes a first lens G11, and the first lens of the first component G1 is the first lens G11; second component G2 includes refractive element G21, second lens G22 and third lens G23, the first lens of second component G2 is refractive element G21, the second lens of second component G2 is second lens G22, and the third lens of second component G2 is third lens G23; third component G3 includes fourth lens G31, fifth lens G32, sixth lens G33 and seventh lens G34, the first lens of third component G3 is fourth lens G31, the second lens of third component G3 is fifth lens G32, the third lens of third component G3 is sixth lens G33, and the fourth lens of third component G3 is seventh lens G34; fourth component G4 includes eighth lens G41, ninth lens G42 and tenth lens G43, the first lens of fourth component G4 is eighth lens G41, the second lens of fourth component G4 is ninth lens G42, and the third lens of fourth component G4 is tenth lens G43. In the present embodiment, the diameter of the largest lens in the optical lens 10 is 13.78mm to ensure the miniaturization of the optical lens 10. The eighth lens G41 is a cemented lens, which is beneficial to correct chromatic aberration of the optical lens 10, so that the optical lens 10 can obtain better imaging quality.
The first lens G11 has positive focal power, the second lens G22 has positive focal power, the third lens G23 has negative focal power, the fourth lens G31 has positive focal power, the fifth lens G32 has positive focal power, the sixth lens G33 has negative focal power, the seventh lens G34 has negative focal power, the eighth lens G41 has positive focal power, the ninth lens G42 has negative focal power, the tenth lens G43 has positive focal power, and the eleventh lens G24 has negative focal power. Through the cooperation of different lenses, the zoom range of the optical lens 10 is wide enough, the optical lens 10 has a good imaging effect, and the terminal 1000 is thinned.
Referring to fig. 42 and 43, in the present embodiment, when the optical lens 10 zooms, the first component G1, the third component G3, and the fourth component G4 move along the optical axis respectively. Specifically, for example, when optical lens 10 is zoomed from a wide-angle state to a telephoto state, second element G2 is not moved, first element G1, third element G3, and fourth element G4 are moved toward the image side, the distance between first element G1 and second element G2 becomes larger, the distance between second element G2 and third element G3 becomes smaller, the distance between third element G3 and fourth element G4 becomes larger and smaller, and the total optical length of optical lens 10 becomes longer. When optical lens 10 is zoomed from the wide-angle state to the micro-focus state, second element G2 remains still, first element G1 moves to the image side, third element G3 and fourth element G4 move to the object side, the distance between first element G1 and second element G2 becomes smaller, the distance between second element G2 and third element G3 becomes smaller, the distance between third element G3 and fourth element G4 becomes smaller, and the total optical length of optical lens 10 becomes shorter.
The basic parameters of the third embodiment of the present application are as shown in table 9 below according to the above relations.
Table 9 basic parameters of the optical lens 10 of the third embodiment
Figure BDA0002606371440000261
Table 10 shows the radius of curvature, thickness, refractive index, and abbe number of each constituent lens of the optical lens 10 in the third embodiment of the present application, as shown in table 10.
TABLE 10 radius of curvature, thickness, refractive index, Abbe number of each constituent lens of the optical lens 10 of the third embodiment
Figure BDA0002606371440000262
Figure BDA0002606371440000271
In the above table, the meanings of the symbols in the table are as follows.
R27: the radius of curvature of the object-side surface of the eighth lens G41 to which the film is attached.
R17: the radius of curvature of the image side of the conformable film of the eighth lens G41.
R18: radius of curvature of image side surface of lens of the eighth lens G41.
d 14: the on-axis thickness of the conformable film of the eighth lens G41.
d 9: the on-axis thickness of the lens of the eighth lens G41.
n 14: refractive index of the adhesive film of the eighth lens G41.
n 9: refractive index of the lens of the eighth lens G41.
v 14: abbe number of the bonded film of the eighth lens G41.
v 9: abbe number of lens of the eighth lens G41.
Table 11 shows aspheric coefficients of the optical lens 10 of the present embodiment, and the number of aspheric surfaces in the optical lens 10 of the present embodiment is 14, specifically, as shown in table 11.
Table 11 aspherical surface coefficients of optical lens 10 according to the third embodiment
Figure BDA0002606371440000272
Figure BDA0002606371440000281
By substituting the above parameters into the formula:
Figure BDA0002606371440000282
that is, each lens of the optical lens 10 of the present embodiment can be designed, where z is the rise of the aspheric surface, r is the radial coordinate of the aspheric surface, and c is the aspheric vertex sphere curvature.
In the present embodiment, different lenses of the optical lens 10 designed by the above parameters can respectively perform different functions, so that the optical lens 10 with good imaging quality can be obtained by matching the lenses.
Table 12 shows object distances and component intervals in the telephoto state, the intermediate focus state, the wide angle state, and the micro-focus state of the optical lens 10 of the present embodiment, as shown in table 12.
Table 12 object distances and component intervals in the telephoto state, the intermediate focus state, the wide angle state, and the micro-focus state of the optical lens 10 of the third embodiment
W C T M
a0 Inf Inf Inf 50mm
a1 0.17mm 6.46mm 10.54mm 1.45mm
a4 6.13mm 3.16mm 0.75mm 6.65mm
a8 3.41mm 4.06mm 3.21mm 0.48mm
a11 0.72mm 3.04mm 6.30mm 3.14mm
Fig. 44 to 55 are characteristic diagrams of the optical performance of the optical lens 10 of the third embodiment.
Specifically, fig. 44 shows axial aberrations of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm in the telephoto state of the optical lens 10 after passing through the optical lens 10 of the third embodiment. Fig. 45 shows axial aberrations of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm in the intermediate focus state of the optical lens 10 after passing through the optical lens 10 of the third embodiment. Fig. 46 shows axial aberrations of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm in the wide-angle state of the optical lens 10 after passing through the optical lens 10 of the third embodiment. Fig. 47 shows axial aberrations of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm in the micro-focus state of the optical lens 10 after passing through the optical lens 10 of the third embodiment. The ordinate of fig. 44-47 represents the normalized pupil coordinate, and the abscissa represents the aberration in the axial direction, in millimeters. As can be seen from fig. 44 to 47, in the present embodiment, the axial aberration of the optical lens 10 in each state is controlled within a small range.
Fig. 48 shows lateral chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens 10 of the third embodiment in the telephoto state of the optical lens 10. Fig. 49 shows lateral chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens 10 of the third embodiment in the intermediate focus state of the optical lens 10. Fig. 50 shows lateral chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens 10 of the third embodiment in the wide-angle state of the optical lens 10. Fig. 51 shows lateral chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the optical lens 10 of the third embodiment in a micro-focus state of the optical lens 10. The ordinate of fig. 48-51 represents the field angle in degrees (°) and the abscissa in microns (μm). The dashed lines not labeled in fig. 48 to 51 indicate the diffraction limit ranges of the optical lens 10. As can be seen from fig. 48 to 51, the lateral chromatic aberration of the optical lens 10 after passing through the optical lens 10 of the third embodiment at each wavelength in each state of the optical lens 10 is within the diffraction limit, that is, the lateral chromatic aberration of the optical lens 10 after passing through the optical lens 10 of the third embodiment at each wavelength in each state of the optical lens 10 does not substantially affect the imaging quality of the optical lens 10.
Fig. 52 to 55 are schematic diagrams showing optical distortion of the optical lens 10 in a telephoto state, a middle focus state, a wide angle state, and a micro focus state, respectively, for representing a difference between an imaging distortion and an ideal shape after light passes through the optical lens 10. In the left diagrams in fig. 52-55, the solid lines are field curvature diagrams in the meridional direction of 555nm light passing through the optical lens 10 in the telephoto state, the middle focus state, the wide angle state, and the micro focus state, respectively; in fig. 52-55, dotted lines are field curvature diagrams in the sagittal direction of 555nm light passing through the optical lens 10 in the telephoto state, the intermediate focus state, the wide angle state, and the micro-focus state, respectively. The right diagrams in fig. 52 to 55 are schematic optical distortion diagrams of 555nm light passing through the optical lens 10 according to the third embodiment in the telephoto state, the intermediate focus state, the wide angle state, and the micro-focus state, respectively. As can be seen from fig. 52 to 55, in the present embodiment, the optical system controls distortion within a visual range.
The optical lens 10 provided in the present embodiment can make the optical lens 10 compact and have a sufficiently wide zoom range, and make the optical lens 10 have a good imaging effect, while realizing the thinning of the terminal 1000, by a combination of the arrangement of each lens in each group and the lens having a specific optical design.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (16)

1. An optical lens includes a first component, a second component, a third component and a fourth component arranged in order from an object side to an image side, each of the first through fourth components comprising at least one lens, the second component comprising a light refracting element, the light refracting part is used for changing the transmission route of the light transmitted from the first component, the third component and the fourth component are coaxially arranged, and the optical axes of the third component and the fourth component form an included angle with the optical axis of the first component, the second component is fixed relative to the position of the imaging surface of the optical lens, the first component, the third component and the fourth component can move relative to the second component, so that the optical lens changes among a telephoto state, a middle focus state, a wide angle state, and a micro-focus state.
2. An optical lens according to claim 1, wherein when the optical lens is in a telephoto state, the optical lens satisfies the following relationship:
1.0≤TTL/EFLmax≤1.7;
wherein, TTL is the total optical length of the optical lens, and EFLmax is the effective focal length of the optical lens in the telephoto state.
3. An optical lens according to claim 2, characterized in that the optical lens satisfies the following relation:
0.01≤IH/EFLmax≤0.1;
and IH is the image height of the optical lens.
4. An optical lens according to any one of claims 1 to 3, characterized in that the first component has a positive optical power, and the first component satisfies the following relation:
1.0≦|fs1/ft|≦1.7;
wherein fs is1And ft is the focal length of the first component, and ft is the focal length of the optical lens in a long focal state.
5. An optical lens according to any one of claims 1 to 4, characterized in that the second component has a negative optical power, and the second component satisfies the following relation:
0.1≦|fs2/ft|≦0.7;
wherein fs is2And ft is the focal length of the second component, and ft is the focal length of the optical lens in the long-focus state.
6. An optical lens according to any one of claims 1 to 5, characterized in that the third component has a positive optical power, and the third component satisfies the following relation:
0.1≦|fs3/ft|≦0.7;
wherein fs is3And ft is the focal length of the third component, and ft is the focal length of the optical lens in the long-focus state.
7. An optical lens according to any one of claims 1 to 6, characterized in that the fourth component has a positive optical power, and the fourth component satisfies the following relation:
0.3≦|fs4/ft|≦0.9;
wherein fs is4And ft is the focal length of the fourth component, and ft is the focal length of the optical lens in the telephoto state.
8. An optical lens according to any one of claims 1 to 7, characterized in that the optical lens satisfies the following relation:
4mm≤φmax≤15mm;
wherein φ max is the diameter of the largest lens among said first, second, third and fourth components.
9. The optical lens of claim 8, wherein the first, second, third and fourth components have N optical lenses having optical power, where N is an integer greater than or equal to 7 and less than or equal to 15, and at least 7 aspheric lenses are included in the N optical lenses.
10. An optical lens as claimed in claim 1, characterized in that the difference between the chief ray angle of the optical lens in the wide-angle state and the chief ray angle in the tele state is less than or equal to 3 degrees.
11. An optical lens according to claim 1 or 10, characterized in that the difference between the chief ray angle of the optical lens in the telephoto state and the chief ray angle in the micro-focus state is less than or equal to 5 degrees.
12. An optical lens according to claim 1, characterized in that the fourth component comprises a cemented lens.
13. An optical lens according to claim 1, characterized in that the optical lens comprises an optical stop, which is located on the object side of the third component.
14. A lens module comprising the optical lens of any one of claims 1 to 13, a photosensitive element, a driving element, and the optical lens, wherein the photosensitive element is located at an image side of the optical lens and at an image plane of the optical lens, and the driving element is configured to drive the first, third, and fourth elements to move relative to the second element.
15. A terminal comprising a lens module as recited in claim 14 and an image processor communicatively coupled to the lens module, the lens module being configured to capture image data and input the image data to the image processor, the image processor being configured to process the image data output therefrom.
16. The terminal of claim 15, further comprising a housing, wherein the lens module and the image processor are both accommodated in the housing, the housing is provided with a light hole, the first element of the lens module faces the light hole, and when the driving member drives the first element to move away from the second element, the first element can extend out of the housing through the light hole.
CN202010739758.2A 2020-07-28 2020-07-28 Optical lens, lens module and terminal Pending CN114002831A (en)

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